Where will you likely find yourself the poorest person in town? There are places where even a well-to-do household, by normal standards, would have a hard time keeping up with the Joneses. To identify the 50 richest areas in the U.S. for Businessweek.com, Little Rock data company Gadberry Group looked at all Zip Codes in the U.S. with more than 100 households and ranked them by the average income and net worth of their households. The area’s population change since 2000 was also taken into consideration, though only as a minor factor, and no areas with a decrease in number of households, where wealth might become less concentrated, were included. The results include many places around New York, Washington, D.C., and Silicon Valley. As Gadberry’s survey mainly captured data on primary residences, many affluent second-home markets, such as the Hamptons on Long Island and Aspen, Colo., did not make the top 50. Also, neighborhoods in such urban areas as Manhattan and San Francisco that have pockets of extreme wealth did not make the list because they have a greater diversity of income earners.

Click here to see America’s 50 richest growing Zip Codes.

Note: As a reference, Gadberry Group identified the predominant demographic cluster in each area using categories from marketing technology company Acxiom. These clusters include “elite” couples and singles (people with enormous disposable income and no school-age children who indulge in luxuries), executives and professionals in their 40s and 50s without children (educated and well-compensated singles and couples who tend to be serious travelers and good investors), and wealthy families (suburban households with children who shop at upscale stores and enjoy leisure activities). For each neighborhood, the predominant group is noted in the caption.

Photography by: Getty Images

Where will you likely find yourself the poorest person in town? There are places where even a well-to-do household, by normal standards, would have a hard time keeping up with the Joneses. To identify the 50 richest areas in the U.S. for Businessweek.com, Little Rock data company Gadberry Group looked at all Zip Codes in the U.S. with more than 100 households and ranked them by the average income and net worth of their households. The area’s population change since 2000 was also taken into consideration, though only as a minor factor, and no areas with a decrease in number of households, where wealth might become less concentrated, were included. The results include many places around New York, Washington, D.C., and Silicon Valley. As Gadberry’s survey mainly captured data on primary residences, many affluent second-home markets, such as the Hamptons on Long Island and Aspen, Colo., did not make the top 50. Also, neighborhoods in such urban areas as Manhattan and San Francisco that have pockets of extreme wealth did not make the list because they have a greater diversity of income earners.

Click here to see America’s 50 richest growing Zip Codes.

Note: As a reference, Gadberry Group identified the predominant demographic cluster in each area using categories from marketing technology company Acxiom. These clusters include “elite” couples and singles (people with enormous disposable income and no school-age children who indulge in luxuries), executives and professionals in their 40s and 50s without children (educated and well-compensated singles and couples who tend to be serious travelers and good investors), and wealthy families (suburban households with children who shop at upscale stores and enjoy leisure activities). For each neighborhood, the predominant group is noted in the caption.

Photography by: Getty Images

America’s Richest Zip Codes 2011

Where the 1 Percent Lives
Where the 1 Percent Lives

Where will you likely find yourself the poorest person in town? There are places where even a well-to-do household, by normal standards, would have a hard time keeping up with the Joneses. To identify the 50 richest areas in the U.S. for Businessweek.com, Little Rock data company Gadberry Group looked at all Zip Codes in the U.S. with more than 100 households and ranked them by the average income and net worth of their households. The area’s population change since 2000 was also taken into consideration, though only as a minor factor, and no areas with a decrease in number of households, where wealth might become less concentrated, were included. The results include many places around New York, Washington, D.C., and Silicon Valley. As Gadberry’s survey mainly captured data on primary residences, many affluent second-home markets, such as the Hamptons on Long Island and Aspen, Colo., did not make the top 50. Also, neighborhoods in such urban areas as Manhattan and San Francisco that have pockets of extreme wealth did not make the list because they have a greater diversity of income earners.

Click here to see America’s 50 richest growing Zip Codes.

Note: As a reference, Gadberry Group identified the predominant demographic cluster in each area using categories from marketing technology company Acxiom. These clusters include “elite” couples and singles (people with enormous disposable income and no school-age children who indulge in luxuries), executives and professionals in their 40s and 50s without children (educated and well-compensated singles and couples who tend to be serious travelers and good investors), and wealthy families (suburban households with children who shop at upscale stores and enjoy leisure activities). For each neighborhood, the predominant group is noted in the caption.

Photography by: Getty Images

No. 50 Richest Zip Code: 94507, Alamo, Calif.
No. 50 Richest Zip Code: 94507, Alamo, Calif.
No. households:* 5,462
Pct. change in no. households since 2000:* 4.38
Average household income:* $207,916
Average household net worth:* $1,412,271

A quiet suburb of the San Francisco area, 19 miles east of Oakland, Alamo is a wealthy enclave of large lots with great views of 3,864-foot-tall Mount Diablo. In the San Ramon Valley, this Zip Code is dominated by elite couples and singles.

* Data source on all slides: Gadberry Group. Figures are for 2011.

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No. 49 Richest Zip Code: 10538, Larchmont, N.Y.
No. 49 Richest Zip Code: 10538, Larchmont, N.Y.
No. households: 5,921
Pct. change in no. households since 2000: 0.20
Average household income: $265,999
Average household net worth: $1,273,184

A wealthy suburb of New York City, Larchmont falls within the town of Mamaroneck. Before the rise of the automobile, it was a summer community that looked out over the water of Long Island Sound. Today it remains a popular bedroom community for commuters who work in Manhattan, which is around 35 minutes away by train. The residents are dominated by middle-aged executives and professionals without children.

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No. 48 Richest Zip Code: 22039, Fairfax Station, Va.
No. 48 Richest Zip Code: 22039, Fairfax Station, Va.
No. households: 5,890
Pct. change in no. households since 2000: 5.63
Average household income: $227,054
Average household net worth: $1,339,712

A rural area of cul-de-sacs that curl into the woods, Fairfax Station is 22 miles southwest of Washington D.C. Many of the area's homes sit on more than half an acre and swell to more than 5,000 square feet. The predominant cluster in the area is elite couples and singles.

Photography by: Vincent Ricardel/Getty Images
No. 47 Richest Zip Code: 20815, Chevy Chase, Md.
No. 47 Richest Zip Code: 20815, Chevy Chase, Md.
No. households: 11,744
Pct. change in no. households since 2000: 2.44
Average household income: $229,407
Average household net worth: $1,346,065

Chevy Chase is an upscale residential suburb next to Bethesda, on the border of Washington D.C. The Zip Code includes the shopping area of Friendship Village, North Chevy Chase, and Somerset. The Area's predominant cluster is made up of executives and professionals in their 40s and 50s without children.

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No. 46 Richest Zip Code: 07021, Essex Fells, N.J.
No. 46 Richest Zip Code: 07021, Essex Fells, N.J.
No. households: 730
Pct. change in no. households since 2000: 3.69
Average household income: $230,479
Average household net worth: $1,374,700

A green section of New Jersey sandwiched between Grover Cleveland Park and the Essex Fells Country Club, the Zip Code is a rich slice of mansion pie. The predominant cluster in the area is 40- to 50-year-old executives and professionals with no children.

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No. 45 Richest Zip Code: 11576, Roslyn, N.Y.
No. 45 Richest Zip Code: 11576, Roslyn, N.Y.
No. households: 4,432
Pct. change in no. households since 2000: 6.28
Average household income: $224,318
Average household net worth: $1,383,774

A community at the tip of Hempstead Harbor, on the northern edge of Long Island, Roslyn is 24 miles from Midtown Manhattan. The green residential area surrounds a small nature preserve named for poet and former resident William Cullen Bryant. The predominant cluster is executives and professionals in their 40s and 50s, with no children.

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No. 44 Richest Zip Code: 10580, Rye, N.Y.
No. 44 Richest Zip Code: 10580, Rye, N.Y.
No. households: 6,117
Pct. change in no. households since 2000: 0.31
Average household income: $268,748
Average household net worth: $1,290,241

A well-heeled suburb near the Connecticut border and fronting Long Island Sound, Rye is dotted with parks such as the Marshlands Conservancy and three manicured golf courses: Westchester Country Club, Willow Ridge Golf Club, and Apawamis Golf Club. The predominant cluster is elite singles and couples.

Photography by: Lee Ergulec/Getty Images
No. 43 Richest Zip Code: 10576, Pound Ridge, N.Y.
No. 43 Richest Zip Code: 10576, Pound Ridge, N.Y.
No. households: 1,770
Pct. change in no. households since 2000: 9.33
Average household income: $244,147
Average household net worth: $1,303,539

Just across the Connecticut border and the tony town of New Canaan, Pound Ridge has long attracted successful people in the arts, from Tallulah Bankhead to "Shrek" creator Mike Myers. The Zip Code encompasses much of Ward Pound Ridge County Park, 4,315 acres that form the largest park in Westchester County and that feature extensive trails for hiking and running. The predominant cluster is elite couples and singles.

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No. 42 Richest Zip Code: 11765, Mill Neck, N.Y.
No. 42 Richest Zip Code: 11765, Mill Neck, N.Y.
No. households: 218
Pct. change in no. households since 2000: 34.57
Average household income: $213,504
Average household net worth: $1,454,855

In Long Island's Nassau County, between Locust Valley and Oyster Bay, Mill Neck is a land of sprawling waterfront estates, rows of perfectly trimmed hedges, sparkling swimming pools, and prim private tennis courts. For commuters, Penn Station is just over an hour away on the Long Island Rail Road—or 33 short miles by helicopter. The area is predominantly elite couples and singles.

Photography by: Mitchell Funk/Getty Images
No. 41 Richest Zip Code: 94506, Danville, Calif.
No. 41 Richest Zip Code: 94506, Danville, Calif.
No. households: 7,220
Pct. change in no. households since 2000: 16.98
Average household income: $217,501
Average household net worth: $1,410,241

Danville is a pretty Oakland and San Francisco suburb carved into the open space beneath Mount Diablo State Park. The Zip Code also encompasses the cul-de-sacs of the nearby community of Blackhawk. The predominant cluster is elite couples and singles.

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No. 40 Richest Zip Code: 33149, Key Biscayne, Fla.
No. 40 Richest Zip Code: 33149, Key Biscayne, Fla.
No. households:: 4,643
Pct. change in no. households since 2000: 9.02
Average household income: $232,228
Average household net worth: $1,339,483

The former home of Richard Nixon and what was called the Florida White House, Key Biscayne is an island near Miami that caters to elite couples and singles. The area features parks, beaches, Biscayne Nature Center, and Crandon Park Golf Course, along with a growing contingent of resorts and hotels.

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No. 39 Richest Zip Code: 10504, Armonk, N.Y.
No. 39 Richest Zip Code: 10504, Armonk, N.Y.
No. households: 2,622
Pct. change in no. households since 2000: 12.29
Average household income: $252,400
Average household net worth: $1,291,022

Bordering Connecticut and a number of shimmering lakes, Armonk is a New York City suburb 36 miles north of Midtown Manhattan along Interstate 684. It is best known as the site of IBM's world headquarters. The predominant cluster is elite couples and singles.

Photography by: Chuck Fishman/Getty Images
No. 38 Richest Zip Code: 07417, Franklin Lakes, N.J.
No. 38 Richest Zip Code: 07417, Franklin Lakes, N.J.
No. households: 3,671
Pct. change in no. households since 2000: 10.87
Average household income: $223,210
Average household net worth: $1,398,244

Land of three-car garages and private pools, Franklin Lakes is the epitome of upscale suburban sprawl. True to its name, the area has a number of pretty lakes, and the Zip Code borders on the trails of High Mountain Park Preserve. The area's predominant cluster is elite couples and singles.

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No. 38 Richest Zip Code: 07417, Franklin Lakes, N.J.
No. 38 Richest Zip Code: 07417, Franklin Lakes, N.J.
No. households: 3,671
Pct. change in no. households since 2000: 10.87
Average household income: $223,210
Average household net worth: $1,398,244

Land of three-car garages and private pools, Franklin Lakes is the epitome of upscale suburban sprawl. True to its name, the area has a number of pretty lakes, and the Zip Code borders on the trails of High Mountain Park Preserve. The area's predominant cluster is elite couples and singles.

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No. 37 Richest Zip Code: 10514, Chappaqua, N.Y.
No. 37 Richest Zip Code: 10514, Chappaqua, N.Y.
No. households: 4,082
Pct. change in no. households since 2000: 3.74
Average household income: $257,801
Average household net worth: $1,317,074

An idyllic hamlet 37 miles north of Midtown Manhattan, Chappaqua is an artsy enclave that is home to both the Chappaqua Orchestra and the Westchester Jazz Orchestra. Elite couples and singles, including the truly elite couple of Bill and Hillary Clinton, form the predominant cluster.

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No. 36 Richest Zip Code: 06820, Darien, Conn.
No. 36 Richest Zip Code: 06820, Darien, Conn.
No. households: 6,891
Pct. change in no. households since 2000: 1.61
Average household income: $248,643
Average household net worth: $1,368,237

A sleepy Connecticut suburb northeast of Stamford and 40 miles from downtown New York City, Darien has impressive mansions that look out over its waterfront on Long Island Sound. The predominant clusters in the area are executives and professionals in their 40s and 50s without children.

Photography by: Patti McConville/Getty Images
No. 35 Richest Zip Code: 10583, Scarsdale, N.Y.
No. 35 Richest Zip Code: 10583, Scarsdale, N.Y.
No. households: 13,479
Pct. change in no. households since 2000: 1.80
Average household income: $263,642
Average household net worth: $1,320,903

Just 24 miles north of the Big Apple, this Westchester County community is a rich suburb of leafy trees, parks, top-notch schools, and a charming downtown area. The predominant cluster is elite couples and singles.

Photography by: Dana Hoff/Getty Images
No. 34 Richest Zip Code: 91108, San Marino, Calif.
No. 34 Richest Zip Code: 91108, San Marino, Calif.
No. households: 4,403
Pct. change in no. households since 2000: 1.06
Average household income: $227,241
Average household net worth: $1,459,899

A suburb in the greater Los Angeles area, San Marino has expensive homes and green parks. It is also home to the Huntington Library Art Gallery & Botanical Gardens. The predominant cluster is elite couples and singles.

Photography by: Trinette Reed/Getty Images
No. 33 Richest Zip Code: 95030, Los Gatos, Calif.
No. 33 Richest Zip Code: 95030, Los Gatos, Calif.
No. households: 5,312
Pct. change in no. households since 2000: 1.74
Average household income: $224,571
Average household net worth: $1,468,998

A Bay Area town tucked into the foothills of the Santa Cruz Mountains, Los Gatos gets pricier as you go up in elevation, with multimillion-dollar mansions on the curling roads that stretch up into the green. The predominant cluster in the area is elite couples and singles.

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No. 32 Richest Zip Code: 94304, Palo Alto, Calif.
No. 32 Richest Zip Code: 94304, Palo Alto, Calif.
No. households: 1,649
Pct. change in no. households since 2000: 103.58
Average household income: $247,711
Average household net worth: $1,323,806

One of the fastest-growing Zip Codes in this ranking, Palo Alto is a city made rich, in part, through the many Silicon Valley businesses headquartered there. Stanford University also calls Palo Alto home and enriches the area as the top employer. This Zip Code is in a cluster of wealthy areas, including the fifth-richest Zip Code, 94028; the ninth, 94022; and the twenty-third, 94024. The dominant group is wealthy families.

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No. 31 Richest Zip Code: 90274, Palos Verdes Peninsula, Calif.
No. 31 Richest Zip Code: 90274, Palos Verdes Peninsula, Calif.
No. households: 10,012
Pct. change in no. households since 2000: 6.93
Average household income: $219,642
Average household net worth: $1,464,162

The rolling, green hills of the Palos Verdes Peninsula are a natural place for elite couples and singles of the greater Los Angeles area. It has gorgeous views of the Pacific Ocean and larger lots with homes along curling roads and quiet cul-de-sacs.

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No. 30 Richest Zip Code: 19085, Villanova, Pa.
No. 30 Richest Zip Code: 19085, Villanova, Pa.
No. households: 1,845
Pct. change in no. households since 2000: 1.49
Average household income: $270,720
Average household net worth: $1,353,580

Home to Villanova University, the community of Villanova is at the heart of Philadelphia's Main Line, a string of wealthy suburbs dominated by elite couples and singles. The Zip Code includes both Villanova and Radnor Township.

Photography by: Ariel Skelley/Getty Images
No. 29 Richest Zip Code: 20854, Potomac, Md.
No. 29 Richest Zip Code: 20854, Potomac, Md.
No. households: 16,714
Pct. change in no. households since 2000: 5.54
Average household income: $242,441
Average household net worth: $1,394,164

A wealthy suburb along the Potomac River 17 miles north of Washington D.C., Potomac is home to more than a few elite couples and singles. The Zip Code also hosts the upscale private golf club TPC Potomac at Avenel Farm and a plush Montgomery County course, Falls Road.

Photography by: Adam Jones/Getty Images
No. 28 Richest Zip Code: 11797, Woodbury, N.Y.
No. 28 Richest Zip Code: 11797, Woodbury, N.Y.
No. households: 3,131
Pct. change in no. households since 2000: 9.09
Average household income: $230,576
Average household net worth: $1,437,915

A green suburb in the center of Long Island, Woodbury has a great deal of open space. Trail View State Park runs through the center of the Zip Code, and other parks dot the area. The predominant cluster is elite couples and singles, and their homes are often on large lots.

Photography by: Rick Lew/Getty Images
No. 27 Richest Zip Code: 06878, Riverside, Conn.
No. 27 Richest Zip Code: 06878, Riverside, Conn.
No. households: 2,713
Pct. Pct. change in no. households since 2000: 0.18
Average household income: $257,173
Average household net worth: $1,414,983

A sliver of elite living space that juts between Cos Cob Harbor and Greenwich Cove in the land of hedge fund managers and CEOs, Riverside is an upscale residential neighborhood in the town of Greenwich in Fairfield County. The predominant cluster is executives and professionals in their 40s and 50s without children.

Photography by Dana Tezarr/Getty Images
No. 26 Richest Zip Code: 06883, Weston, Conn.
No. 26 Richest Zip Code: 06883, Weston, Conn.
No. households: 3,413
Pct. change in no. households since 2000: 4.69
Average household income: $242,113
Average household net worth: $1,414,424

Weston is an affluent community of Fairfield Country that features two-acre zoning and Devil's Den Preserve, a 1,756-acre nature reserve. Among the celebrities who have lived in Weston over the years are choreographer George Balanchine, author Erica Jong, actor and director Robert Redford, and Rolling Stones guitarist Keith Richards. The area's predominant cluster is elite couples and singles.

Photography by : Steve Dunwell/Getty Images
No. 25 Richest Zip Code: 22102, McLean, Va.
No. 25 Richest Zip Code: 22102, McLean, Va.
No. households: 6,225
Pct. change in no. households since 2000: 7.87
Average household income: $242,891
Average household net worth: $1,400,867

McLean, just 11 miles west of Washington, D.C., is where the Central Intelligence Agency is headquartered, so it's home to government agents of all kinds. It's also full of green spaces, such as Great Falls Park and Scotts Run Nature Preserve. The predominant cluster is executives and professionals in their 40s and 50s with no children.

Photography by: Robert Shafer/Getty Images
No. 24 Richest Zip Code: 02030, Dover, Mass.
No. 24 Richest Zip Code: 02030, Dover, Mass.
No. households: 1,900
Pct. change in no. households since 2000: 2.93
Average household income: $240,340
Average household net worth: $1,474,414

Dover, a wealthy town 15 miles from downtown Boston, is on the Charles River and is bordered by Medfield, Needham, Natick, Sherborn, Walpole, and Westwood. Trails provide good walking, cross-country skiing, birding, and horseback riding, according to the town. The predominant population is elite couples and singles.

Photography by: David Papazian/Getty Images
No. 23 Richest Zip Code: 94024, Los Altos, Calif.
No. 23 Richest Zip Code: 94024, Los Altos, Calif.
No. households: 8,062
Pct. change in no. households since 2000: 0.09
Average household income: $239,630
Average household net worth: $1,543,794

This Zip Code includes Loyola and South Los Altos. The 3,900-acre Rancho San Antonio Open Space Preserve and the 165-acre County Park are located here, providing residents with 23 miles of trails for jogging, hiking, biking, and horseback riding. It is next to No. 9 richest Zip Code, 94022. Elite couples and singles for the area's predominant group.

Photography by: Charles Briscoe-Knight/Getty Imagers
No. 22 Richest Zip Code: 10506, Bedford, N.Y.
No. 22 Richest Zip Code: 10506, Bedford, N.Y.
No. households: 2,028
Pct. change in no. households since 2000: 7.99
Average household income: $262,691
Average household net worth: $1,402,187

Part of wealthy Westchester County, the town of Bedford is 47 miles north of New York City. It has three hamlets—Bedford Village, Katonah, and Bedford Hills, according to the town—and at one time or another has been home to Ralph Lauren, Martha Stewart, Chevy Chase, and Glenn Close, the New York Times has reported. The predominant group in this Zip Code is elite couples and singles.

Photography by: Nina K Claridge/Getty Images
No. 21 Richest Zip Code: 07458, Saddle River, N.J.
No. 21 Richest Zip Code: 07458, Saddle River, N.J.
No. households: 3,729
Pct. change in no. households since 2000: 3.96
Average household income: $236,641
Average household net worth: $1,499,115

This Bergen County Zip Code, which includes the affluent boroughs of Saddle River and Upper Saddle River, has many high-end homes, including mansions near the Saddle River, a tributary of the Passaic River. The predominant group is elite couples and singles.

Photography by: Mario Lalich/Getty Images
No. 20 Richest Zip Code: 30327, Atlanta, Ga.
No. 20 Richest Zip Code: 30327, Atlanta, Ga.
No. households: 8,707
Pct. change in no. households since 2000: 6.87
Average household income: $280,631
Average household net worth: $1,353,189

North of downtown Atlanta, the 30327 Zip Code includes the neighborhoods of Buckhead, Chastain Park, Cross Creek, Londonberry, Margaret Mitchell, Merlendale (Forest Lake), Mt. Paran Parkway, Northside (Mt. Paran), Northside Woods, Powers Lake, Fox Ridge, West Paces Ferry, West Peachtree Battle, Westminster (Milmar), and Whitewater Creek, according to the brokerage Atlanta Fine Homes. The area’s predominant group is elite couples and singles.

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No. 19 Richest Zip Code: 06840, New Canaan, Conn.
No. 19 Richest Zip Code: 06840, New Canaan, Conn.
No. households: 7,002
Pct. change in no. households since 2000: 3.96
Average household income: $277,250
Average household net worth: $1,387,830

GE’s chief executive, Jeff Immelt, actress Katherine Heigl, and talk show host David Letterman are among New Canaan’s famous residents, according to newenglandtimes.com. The median home value in this wealthy Fairfield County town, which is about 45 miles from New York City, was $1,092,000 in September, according to Zillow.com. The predominant group is executives and professionals in their 40s and 50s with no children.

Photography by: Enzo Figueres/Getty Images
No. 18 Richest Zip Code: 95070, Saratoga, Calif.
No. 18 Richest Zip Code: 95070, Saratoga, Calif.
No. households: 11,202
Pct. change in no. households since 2000: 3.59
Average household income: $237,804
Average household net worth: $1,516,018

West of Silicon Valley, Saratoga is a wealthy suburb with a small-town feel and high-end restaurants and boutiques. It is home to the Mountain Winery (founded by California wine industry pioneer Paul Masson) and the wooded, 3,688-acre Sanborn County Park. This Zip Code’s predominant group is elite couples and singles.

Photography by: Scott Markewitz/Getty Images
No. 17 Richest Zip Code: 90272, Pacific Palisades, Calif.
No. 17 Richest Zip Code: 90272, Pacific Palisades, Calif.
No. households: 9,612
Pct. change in no. households since 2000: 1.66
Average household income: $263,656
Average household net worth: $1,461,614

This Pacific Palisades Zip Code includes the areas along Will Rogers State Historic Park, Rustic Canyon Park, Topanga State Park, and Santa Ynez County Park down to the Pacific Coast Highway. These provide many hiking, picnicking, and mountain biking opportunities, notes real estate site livinginthepalisades.com. Many homes in the area—whose famous residents have included Ronald Reagan and Tom Cruise, according to Zillow.com—have ocean or mountain views. The predominant group is elite couples and singles.

Photography by: Danny Warren/Getty Images
No. 16 Richest Zip Code: 02493, Weston, Mass.
No. 16 Richest Zip Code: 02493, Weston, Mass.
No. households: 3,804
Pct. change in no. households since 2000: 3.03
Average household income: $286,805
Average household net worth: $1,406,587

An affluent Boston suburb, Weston is known as a safe town with excellent schools. The median home value in this Zip Code was $1,018,700 in September, according to Zillow.com. The predominant population is elite couples and singles.

Photography by: Frank Siteman/Getty Images
No. 15 Richest Zip Code: 11030, Manhasset, N.Y.
No. 15 Richest Zip Code: 11030, Manhasset, N.Y.
No. households: 6,085
Pct. change in no. households since 2000: 6.87
Average household income: $252,281
Average household net worth: $1,470,336

Such Long Island communities as Manhasset, Plandome, Plandome Heights, Munsey Park, Hamlet Estates, North Hills, Flower Hill, and Strathmore are included in the 11030 Zip Code, which is about 20 miles from Manhattan. Manhasset offers easy access to parks, pools, tennis courts, walking trails, and beaches, according to the local chamber of commerce. The predominant residents in the area are elite couples and singles.

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No. 14 Richest Zip Code: 60093, Winnetka, Ill.
No. 14 Richest Zip Code: 60093, Winnetka, Ill.
No. households:: 6,765
Pct. change in no. households since 2000: 1.58
Average household income: $278,924
Average household net worth: $1,417,368

Tree-lined streets and family-oriented neighborhoods distinguish Winnetka, a community on the shore of Lake Michigan 16 miles north of Chicago, notes the village website. It has four public beaches, a boat launch, parks, athletic fields, an indoor tennis club, ice rink, public golf course, and forest preserve areas. The 60093 Zip Code also includes part of Northfield, Ill. Elite couples and singles make up the predominant group.

Photography by: Adam Jones/Getty Images
No. 13 Richest Zip Code: 60045, Lake Forest, Ill.
No. 13 Richest Zip Code: 60045, Lake Forest, Ill.
No. households: 7,465
Pct. change in no. households since 2000: 3.82
Average household income: $270,525
Average household net worth: $1,415,295

Lake Forest, 31 miles north of Chicago on Lake Michigan, is recognized for its natural beauty and excellent schools, notes the city. Local amenities include the Deerpath Golf Course (an 18-hole public course) and the 4,500-sq.-ft. Lake Forest Fitness Center, which has exercise equipment, aerobics studios, a squash court, and three racquetball courts. The predominant group in this Zip Code is elite couples and singles.

Photography: John Crouch/Getty Images
No. 12 Richest Zip Code: 22066, Great Falls, Va.
No. 12 Richest Zip Code: 22066, Great Falls, Va.
No. households: 5,921
Pct. change in no. households since 2000: 9.57
Average household income: $261,648
Average household net worth: $1,460,360

On the Potomac River about 20 miles from Washington, D.C., Great Falls is a wealthy commuter town. It is home to Riverbend Park and River Bend Country Club. Elite couples and singles predominate in this Zip Code.

Photography by: Cameron Davidson/Getty Images
No. 11 Richest Zip Code: 92657, Newport Coast, Calif.
No. 11 Richest Zip Code: 92657, Newport Coast, Calif.
No. households: 4,150
Pct. change in no. households since 2000: 74.59
Average household income: $264,979
Average household net worth: $1,450,774

Newport Coast, also called the “Pacific Riviera,” includes the coastal area between Corona Del Mar and Laguna Beach and features preserved open space, canyon and ocean landscapes, and nature trails, according to orangecounty.net. Data from RealtyTrac show that the area, though wealthy, has had a high foreclosure rate. The predominant group is executives and professionals in their 40s and 50s with no children.

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No. 10 Richest Zip Code: 90402, Santa Monica, Calif.
No. 10 Richest Zip Code: 90402, Santa Monica, Calif.
No. households: 5,452
Pct. change in no. households since 2000: 3.16
Average household income: $266,243
Average household net worth: $1,494,010

This section of Santa Monica has some of the most expensive houses in Los Angeles County. It includes the chic North of Montana neighborhood, known for palm and pine trees along its streets, attractive homes, and an excellent school system, according to real estate site northofmontana.com. The median home value in 90402 was $1,995,300 in September, Zillow.com estimates. The population is mostly elite couples and singles.

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 No. 9 Richest Zip Code: 94022, Los Altos, Calif.
No. 9 Richest Zip Code: 94022, Los Altos, Calif.
No. households: 7,103
Pct. change in no. households since 2000: 3.23
Average household income: $256,476
Average household net worth: $1,563,480

Adjacent to the No. 23 richest Zip Code, 94024, and roughly 40 miles south of San Francisco, this area includes Los Altos, Los Altos Hills, and Palo Alto Hills. Downtown Los Altos, a six-block triangle, has more than 150 shops and also hosts farmers markets and movie nights, among other community activities, says the Los Altos Village Assn. Many luxury homes in the Los Altos Hills overlook rolling hills and the South and East Bay communities. Elite couples and singles are the predominant population. Los Altos has the highest household net worth of all the Zip codes in this ranking.

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No. 8 Richest Zip Code: 10577, Purchase, N.Y.
No. 8 Richest Zip Code: 10577, Purchase, N.Y.
No. households: 834
Pct. change in no. households since 2000: 14.09
Average household income: $268,696
Average household net worth: $1,503,911

The headquarters of MasterCard (MA) and Pepsico (PEP), Purchase also is home to many commuters to New York City, about 25 miles away. Many residents work in health care, professional services, and finance and insurance, according to Census Bureau data. Elite couples and singles predominate.

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No. 7 Richest Zip Code: 19035, Gladwyne, Pa.
No. 7 Richest Zip Code: 19035, Gladwyne, Pa.
No. households: 1,495
Pct. change in no. households since 2000: 2.47
Average household income: $331,840
Average household net worth: $1,483,586

Once a summer destination for wealthy Philadelphians, Gladwyne, on the Schuylkill River. has become a wealthy year-round community. Its many attractive residences had a median value of $800,500 in September, according to Zillow.com estimates. At publication time, the area’s most expensive home listed for sale on Zillow.com was a $14.9 million mansion at 1211 Mirabeau Lane. The predominant group in this Zip Code is elite couples and singles.

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No. 6 Richest Zip Code: 90077, Los Angeles, Calif.
No. 6 Richest Zip Code: 90077, Los Angeles, Calif.
No. households: 3,553
Pct. change in no. households since 2000: 0.11
Average household income: $290,802
Average household net worth: $1,531,147

The 90077 Zip Code refers to the Bel Air section of Los Angeles, home to celebrities and executives. The district has many expensive residences by the Bel Air Country Club and houses with views of the surrounding valley, according to belair-realestate.com. In addition to mansions, Bel Air has ranch-style properties. It is next door to the fourth-richest Zip Code, 90210. The predominant population in this the Bel Air area is elite couples and singles.

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No. 5 Richest Zip Code: 94028, Portola Valley, Calif.
No. 5 Richest Zip Code: 94028, Portola Valley, Calif.
No. households: 2,579
Pct. change in no. households since 2000: 3.28
Average household income: $270,922
Average household net worth: $1,531,291

This Portola Valley Zip code is adjacent to the No. 9 richest Zip Code, 94022, and the No. 32 richest, 94304. The town of Portola Valley is just west of Stanford University in a valley by the San Andreas Fault. It offers a trail system, scenic roads, open space, and natural views, according to the town. Elite couples and singles are the predominant inhabitants.

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 No. 4 Richest Zip Code: 90210, Beverly Hills, Calif.
No. 4 Richest Zip Code: 90210, Beverly Hills, Calif.
No. households: 9,245
Pct. change in no. households since 2000: 3.71
Average household income: $278,757
Average household net worth: $1,504,166

This neighborhood near the foothills of the Santa Monica Mountains, made famous by the television series Beverly Hills, 90210, is dominated by opulent homes. Rodeo Drive, between Wilshire Boulevard and Sunset Boulevard, has an area of large houses referred to as the Flats, as well as a posh shopping district, according to Sotheby's International Realty. Zillow.com estimates that in September, 90210's median home value was $2,557,700. The area is adjacent to the sixth-richest Zip Code, 90077. The predominant residents of 90210 are executives and professionals in their 40s and 50s with no children.

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No. 3 Richest Zip Code: 60043, Kenilworth, Ill.
No. 3 Richest Zip Code: 60043, Kenilworth, Ill.
No. households: 810
Pct. change in no. households since 2000: 1.00
Average household income: $323,588
Average household net worth: $1,558,833

The village of Kenilworth, about 17 miles from downtown Chicago and south of 60093, the No. 14 richest Zip Code, is the wealthiest area in the Midwest, according to Gadberry’s analysis. The average household income in this exclusive North Shore suburb is $323,588. Elite couples and singles are the predominant residents.

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No. 2 Richest Zip Code: 11568, Old Westbury, N.Y.
No. 2 Richest Zip Code: 11568, Old Westbury, N.Y.
No. households: 1,047
Pct. change in no. households since 2000: 8.61
Average household income: $282,981
Average household net worth: $1,547,866

On Long Island’s north shore, about 25 miles from Manhattan, Old Westbury is New York’s most affluent suburb, according to Gadberry Group. It is home to the Meadowbrook Polo Club, the country’s oldest polo field, and Old Westbury Gardens, built in 1906. The predominant group is elite couples and singles.

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No. 1 Richest Zip Code: 33480, Palm Beach, Fla.
No. 1 Richest Zip Code: 33480, Palm Beach, Fla.

No. households: 5,505*

Pct. change in no. households since 2000: 13.76*

Average household income: $370,136

Average household net worth: $1,486,123

The town of Palm Beach—in America’s richest Zip Code, 33480—is a 16-mile barrier island with the Atlantic Ocean on its eastern boundary and Lake Worth on the west. High-end shopping and dining establishments can be found on Worth Avenue, and the island provides polo, golf, tennis, yachting, and deep-sea fishing, according to Sotheby’s International Realty. The predominant group is executives and professionals in their 40s and 50s with no children. The median age, according to 2010 census data, was 67.5.

*As Gadberry Group’s estimates for Palm Beach include some part-year residents, figures differ from U.S. Census Bureau counts, which show a decrease in population from 2000 to 2010.