21. Austin-Round Rock, TX
Per Capita Personal Income: $51,014
U.S. Rank: 48
GDP: $119,949 millions
U.S. Rank: 32
The capital of Texas, Austin has a population close to 1 million, while its metropolitan area is home to more than 2 million residents. The area saw a steady growth in both per capita personal income and GDP in the last 5 years.