Rankings IdahoOldest by median age

Oldest Cities in Idaho by Median Age

The top 25 of 30 Idaho cities on GIS Map, ranked by highest median age.

#	City	County	Median age	Population
1	Sun Valley	Blaine	56.5 years	1,460
2	Eagle	Ada	47.6 years	32,855
3	Salmon	Lemhi	46.8 years	3,203
4	Garden City	Ada	42.3 years	12,654
5	Hayden	Kootenai	42.1 years	16,338
6	Sandpoint	Bonner	41.5 years	9,637
7	Hailey	Blaine	41.3 years	9,665
8	Star	Ada	40.3 years	14,745
9	Coeur d'Alene	Kootenai	40.1 years	56,447
10	Lewiston	Nez Perce	39.8 years	34,651
11	McCall	Valley	38.9 years	3,946
12	Boise	Ada	38.6 years	237,242
13	Driggs	Teton	38.2 years	2,925
14	Meridian	Ada	37.5 years	130,138
15	Rathdrum	Kootenai	37.1 years	10,874
16	Chubbuck	Bannock	35.9 years	16,126
17	Twin Falls	Twin Falls	35.1 years	54,164
18	Post Falls	Kootenai	35 years	43,391
19	Blackfoot	Bingham	34.7 years	12,782
20	Nampa	Canyon	33.9 years	110,319
21	Idaho Falls	Bonneville	33.7 years	67,725
22	Pocatello	Bannock	33.1 years	57,635
23	Ammon	Bonneville	32.9 years	19,064
24	Kuna	Ada	31.8 years	27,158
25	Mountain Home	Elmore	31.7 years	16,493

Top Idaho Counties

Counties ranked by highest median age.

1. Custer County60 years 2. Adams County53.9 years 3. Boise County53.4 years 4. Lemhi County53.3 years 5. Clearwater County52.2 years 6. Idaho County49.4 years 7. Lewis County49 years 8. Bonner County48.1 years 9. Valley County46.9 years 10. Blaine County45.6 years

Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates. Only cities covered by GIS Map with at least 1,000 residents are ranked. Estimates carry margins of error.

Citing this page: GIS Map, “Oldest Cities in Idaho by Median Age”, https://gismap.land/rankings/idaho/oldest-cities. Figures from U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.

Oldest Cities in Idaho by Median Age

Top Idaho Counties

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