Special Report

This Is America's Fastest Growing County

Source: kenlund / Flickr

5. Comal County, Texas
> 2020 population: 161,501
> 2010 population: 108,472
> Pct. Change in population: 48.9%

4. Dallas County, Iowa
> 2020 population: 99,678
> 2010 population: 66,135
> Pct. Change in population: 50.7%

Source: dlewis33 / Getty Images

3. Hays County, Texas
> 2020 population: 241,067
> 2010 population: 157,107
> Pct. Change in population: 53.4%

Source: chamey / iStock via Getty Images

2. Williams County, North Dakota
> 2020 population: 40,950
> 2010 population: 22,398
> Pct. Change in population: 82.8%

1. McKenzie County, North Dakota
> 2020 population: 14,704
> 2010 population: 6,360
> Pct. Change in population: 131.2%

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