Special Report

The Oldest County in Every State

Hawaii: Kalawao County
> Median age: 57.4 years (state: 39.1 years)
> Population under 18: 1.5% (state: 21.4%)
> Population 65 and over: 16.7% (state: 17.8%)
> Total population: 66
> Largest place in county: N/A

Idaho: Adams County
> Median age: 55.2 years (state: 36.4 years)
> Population under 18: 17.1% (state: 25.7%)
> Population 65 and over: 29.5% (state: 15.4%)
> Total population: 4,097
> Largest place in county: Council

Source: Roberto Galan / iStock Editorial via Getty Images

Illinois: Pope County
> Median age: 52.5 years (state: 38.1 years)
> Population under 18: 14.9% (state: 22.6%)
> Population 65 and over: 27.4% (state: 15.2%)
> Total population: 4,203
> Largest place in county: Golconda

Source: Kenneth_Keifer / Getty Images

Indiana: Brown County
> Median age: 50.0 years (state: 37.7 years)
> Population under 18: 17.8% (state: 23.6%)
> Population 65 and over: 24.3% (state: 15.4%)
> Total population: 15,064
> Largest place in county: Nashville

Source: dosecreative / iStock

Iowa: Dickinson County
> Median age: 48.4 years (state: 38.2 years)
> Population under 18: 18.9% (state: 23.2%)
> Population 65 and over: 25.5% (state: 16.7%)
> Total population: 17,127
> Largest place in county: Spirit Lake