Youngest County in Every State

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Source: hyku / Flickr

1. Alabama: Lee County
> Median age: 31.0 years (county), 38.7 years (state)
> Pop. under 18: 21.6% (county), 22.7% (state)
> Population: 156,597
> Life expectancy: 76.5 years
> County seat: Opelika

Source: Public Domain / Wikimedia Commons

2. Alaska: Kusilvak Census Area
> Median age: 24.0 years (borough), 33.9 years (state)
> Pop. under 18: 39.7% (borough), 25.2% (state)
> Population: 8,129
> Life expectancy: 70.8 years
> Largest city: Hooper Bay

Source: fdastudillo / Getty Images

3. Arizona: Coconino County
> Median age: 30.6 years (county), 37.2 years (state)
> Pop. under 18: 21.5% (county), 23.8% (state)
> Population: 138,639
> Life expectancy: 79.4 years
> County seat: Flagstaff

Source: arkansasoutside / Flickr

4. Arkansas: Washington County
> Median age: 31.5 years (county), 37.9 years (state)
> Pop. under 18: 24.9% (county), 23.7% (state)
> Population: 223,683
> Life expectancy: 78.1 years
> County seat: Fayetteville

Source: tupungato / Getty Images

5. California: Tulare County
> Median age: 30.6 years (county), 36.1 years (state)
> Pop. under 18: 31.4% (county), 23.4% (state)
> Population: 458,809
> Life expectancy: 78.3 years
> County seat: Visalia