Map of Median Age by U.S. County
This is an interactive map of Median Age by U.S. County. Green hues represent young counties. Red hues represent the counties with older populations. Hover over the map to see the county, state, total population, and median age. Zoom in for more detail. Scroll down for more information.
Median Age (years)
U.S. Median Age
Median age is the age at which half of the population is older and half of the population is younger.
The U.S. Median age is 39. Every year the country gets older by 0.2 years.
The oldest state by poplation age is Maine with a median age of 45.
Utah is the youngest state by age.
The values for this map were obtained from the U.S. Census. The data is from 2019 to 2023.
Map of the United States
Counties with the Youngest Population
- Madison County, Idaho: 27
- Chattahoochee County, Georgia: 28
- Kusilvak Census Area, Alaska: 29
- Todd County, South Dakota: 31
- Jim Hogg County, Texas: 31
Madison County, ID
Madison is known for producing potatoes and for having the closest hospital to Yellowstone National Park.
"With a strongly conservative population, Madison County is one of the most staunchly Republican counties in the United States". Source: MadisonCo.
This last fact might explain a younger population. (Conservatives tend to have more kids). But don't quote me on that one.
Kusilvak or Wade Hampton, AK
There are 3 facts that might affect Kusilvak's young population.
A high percentage of Alaskan Native Population, a high unemployment rate, and that between 2000 and 2006 it had a sharp increase in Hispanic population.
Todd County, SD
Todd County is one of five South Dakota counties that lies entirely within an Indian reservation.
According to HHS the birth rate among Native American women is about 50% higher than that for all women in the U.S. between the ages of 15 and 50.
This might explain why this last 2 counties are so young.
Counties with the Oldest Population
- Loving County, Texas: 75
- Sumter County, Florida: 62
- Catron County, New Mexico: 57
- Kenedy County, Texas: 56
- Terrell County, Texas: 56
Loving County, TX
Loving county has several particularities, it is the least populated county in the U.S.
It has the highest GDP per capita.
And according to this data set, it is also the county with the oldest population.
It looks like all that oil revenue was just keeping the elderly population and driving away the younger population.
Sumter County, FL
We all know Florida is the place where retirees flock to spend the last years of their lives.
The snowbird trend is still popular for Florida and other southern states. So this Florida county is not a major surprise.
What is fascinating is that in Sumter, is the largest retirement community in the USA, The Villages.
In the Villages, at least 80% of the units in a 55+ community must have at least one resident aged 55 or older.
It also has more golf courses than any other community in the world!
Catron County, NM
Catron is the largest county in New Mexico and the least populated.
In this county the Gila and the Apache National Forests meet.
Kenedy and Terrell Counties, TX
These are also some of the least populated counties in the U.S.
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Resources for Median Population Age Map
The Shapefiles for the states were downloaded from Natural Earth.
The county shapefiles and Median age data came from US Census Bureau.
Made by Luz K. Molina with D3.js.
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