These Are the U.S. Cities With the Fastest-Growing Wealth Gaps

  • Capital of Idaho leaps to top 10 in Bloomberg ranking
  • San Jose comes in at No. 1 in metro area rich-poor gap

Photographer: Daniel Berman/Bloomberg

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Migration from crowded and expensive Pacific Coast cities has propelled Boise -- the capital of Idaho -- onto the list of top 10 gainers in the Bloomberg rich versus poor gapBloomberg Terminal ranking of metropolitan areas from close to the bottom.

The analysis of Census Bureau data tracks the differences in annual income between household income groups. The rich versus poor gap compared households in the top 20 percent to those in the bottom 20 percent by metropolitan area.