How Idaho Compares

Idaho

37.3 years

National

38.9 years

4.1% below

State Ranking

Rank	State	Value
#42	Colorado	37.7 years
#43	Georgia	37.6 years
#44	Kansas	37.4 years
#45	Idaho	37.3 years
#46	Nebraska	37.2 years
#47	Oklahoma	37.0 years
#48	North Dakota	35.9 years

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Highest Age Counties in Idaho

#	County	Age
1	Custer County	60.0 years
2	Adams County	53.9 years
3	Boise County	53.4 years
4	Lemhi County	53.3 years
5	Clearwater County	52.2 years
6	Idaho County	49.4 years
7	Lewis County	49.0 years
8	Bonner County	48.1 years
9	Valley County	46.9 years
10	Blaine County	45.6 years

Lowest Age Counties in Idaho

#	County	Age
44	Madison County	21.4 years
43	Latah County	30.6 years
42	Clark County	31.1 years
41	Jefferson County	32.8 years
40	Elmore County	33.1 years
39	Cassia County	33.2 years
38	Franklin County	33.3 years
37	Bonneville County	33.6 years
36	Jerome County	34.0 years
35	Power County	34.6 years

Median Age in Idaho

Idaho has a median age of 37.3 years, ranking #45 of 52 among all 52 states and territories. This is 4.1% below the national value of 38.9 years.

Across Idaho's 44 counties, median age ranges from 21.4 years to 60.0 years. The county with the highest value is Custer County at 60.0 years.

The median age of the total population.

About this data

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.