Special Report

The Youngest County in Every State

Source: segawa7 / Getty Images

Hawaii: Honolulu County
> Median age: 37.9 years (state: 39.1 years)
> Population under 18: 21.2% (state: 21.4%)
> Population 65 and over: 17.3% (state: 17.8%)
> Total population: 984,821
> Largest place in county: Urban Honolulu

Source: Ken Lund / Flickr

Idaho: Madison County
> Median age: 23.5 years (state: 36.4 years)
> Population under 18: 27.3% (state: 25.7%)
> Population 65 and over: 6.6% (state: 15.4%)
> Total population: 39,100
> Largest place in county: Rexburg

Source: Dori / Wikimedia Commons

Illinois: Champaign County
> Median age: 30.1 years (state: 38.1 years)
> Population under 18: 18.9% (state: 22.6%)
> Population 65 and over: 12.4% (state: 15.2%)
> Total population: 209,922
> Largest place in county: Champaign

Source: Public Domain / Wikimedia Commons

Indiana: Tippecanoe County
> Median age: 28.2 years (state: 37.7 years)
> Population under 18: 20.6% (state: 23.6%)
> Population 65 and over: 11.1% (state: 15.4%)
> Total population: 191,553
> Largest place in county: Lafayette

Source: Larry_Reynolds / Getty Images

Iowa: Story County
> Median age: 26.6 years (state: 38.2 years)
> Population under 18: 16.6% (state: 23.2%)
> Population 65 and over: 11.8% (state: 16.7%)
> Total population: 96,941
> Largest place in county: Ames