America's Melting-Pot Cities

Immigration is a powerful driver of the economic growth and development of American cities and metros. As many of half of all recent Silicon Valley start-ups count a foreign-born American as a member of their founding team, according to recent studies.

The map below, from my Martin Prosperity Institute colleague Zara Matheson, shows the number of newly naturalized American citizens by metro. It's based on newly released data from the United States Office of Immigration Statistics on foreign nationals who were naturalized as American citizens in 2011.