From 2002-2021 (the last 20 years for which data is available), the total U.S. real gross domestic product (GDP adjusted for inflation, or Real GDP) increased by approximately 45%, from $13.5 trillion to $19.6 trillion in chained 2012 dollars. On a per capita basis, county-level real GDP increased by an average of 36% over the past 20 years, with a range of growth from -77% (Brooks County, Texas) to 3,950% (Culberson County, Texas).
Across the country, 2,539 counties experienced an increase in real GDP per capita growth between 2002 and 2021. The plurality were located in Texas (192 counties), (Texas alone has 8% of all U.S. counties), followed by Kansas (100), Georgia (97), Iowa (96), Montana (93) and Nebraska (92).