Data / Rankings / Median age / Counties in Colorado

Counties in Colorado by median age

Custer County had the highest median age of 64 counties in 2023, at 58.6 years. Alamosa County had the lowest, at 33.1 years. The median was 42 years and the figure for Colorado was 37.5 years. Source: the U.S. Census Bureau.

Highest58.6Custer County
Lowest33.1Alamosa County
Median4264 counties
Colorado37.5History

Top 40 counties, 2023

CSVChart (SVG)

Custer CountyCuster County: 58.6 years58.6Dolores CountyDolores County: 57.2 years57.2Ouray CountyOuray County: 55.6 years55.6Huerfano CountyHuerfano County: 55.1 years55.1Hinsdale CountyHinsdale County: 54.8 years54.8Mineral CountyMineral County: 53.7 years53.7Archuleta CountyArchuleta County: 52.2 years52.2Teller CountyTeller County: 52 years52Park CountyPark County: 51.7 years51.7Jackson CountyJackson County: 51.5 years51.5Costilla CountyCostilla County: 50.7 years50.7Saguache CountySaguache County: 49.8 years49.8Clear Creek CountyClear Creek County: 49.2 years49.2Gilpin CountyGilpin County: 48.7 years48.7Delta CountyDelta County: 48.4 years48.4Chaffee CountyChaffee County: 47.6 years47.6Pitkin CountyPitkin County: 47.3 years47.3Las Animas CountyLas Animas County: 46.5 years46.5Montrose CountyMontrose County: 45.7 years45.7Grand CountyGrand County: 45.5 years45.5Fremont CountyFremont County: 44.9 years44.9Elbert CountyElbert County: 44.8 years44.8Montezuma CountyMontezuma County: 44.5 years44.5Kiowa CountyKiowa County: 43.9 years43.9Rio Grande CountyRio Grande County: 43.2 years43.2Baca CountyBaca County: 43 years43Cheyenne CountyCheyenne County: 43 years43Sedgwick CountySedgwick County: 42.9 years42.9San Miguel CountySan Miguel County: 42.7 years42.7Routt CountyRoutt County: 42.6 years42.6La Plata CountyLa Plata County: 42.3 years42.3San Juan CountySan Juan County: 42.2 years42.2Bent CountyBent County: 41.7 years41.7Washington CountyWashington County: 41.2 years41.2Otero CountyOtero County: 40.9 years40.9Mesa CountyMesa County: 40.8 years40.8Lincoln CountyLincoln County: 40.7 years40.7Jefferson CountyJefferson County: 40.4 years40.4Pueblo CountyPueblo County: 40.4 years40.4Phillips CountyPhillips County: 40.3 years40.3
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2023
years		Change on 2022
1Custer County58.6+0.5
2Dolores County57.2-2
3Ouray County55.6-1.2
4Huerfano County55.1-0.3
5Hinsdale County54.8-2.1
6Mineral County53.7-1
7Archuleta County52.2+1.4
8Teller County52+0.9
9Park County51.7+0.4
10Jackson County51.50
11Costilla County50.7-2.1
12Saguache County49.8-0.1
13Clear Creek County49.2-0.3
14Gilpin County48.7+1.3
15Delta County48.4+0.6
16Chaffee County47.6-0.2
17Pitkin County47.3+0.6
18Las Animas County46.5-0.3
19Montrose County45.7-0.2
20Grand County45.5+0.9
21Fremont County44.90
22Elbert County44.8-0.8
23Montezuma County44.5+0.8
24Kiowa County43.9+0.6
25Rio Grande County43.2+1.9
26Baca County43+1
26Cheyenne County43-0.2
28Sedgwick County42.9-1.6
29San Miguel County42.7+0.8
30Routt County42.6+0.7
31La Plata County42.3+0.5
32San Juan County42.2-7.1
33Bent County41.7+1
34Washington County41.2+1
35Otero County40.9+0.4
36Mesa County40.8+0.2
37Lincoln County40.7+0.3
38Jefferson County40.4+0.2
38Pueblo County40.4+0.6
40Phillips County40.3-0.3
41Crowley County39.6-1.7
41Yuma County39.60
43Douglas County39.5+0.2
44Eagle County39.3+1
45Summit County39.2+0.2
46Logan County39.1+0.2
46Rio Blanco County39.1-0.1
48Kit Carson County39-0.2
49Broomfield County38.8+0.2
49Conejos County38.8-0.3
51Prowers County38.5+0.7
52Moffat County37.9+0.8
53Boulder County37.5+0.5
54Arapahoe County37.3+0.2
55Garfield County37.20
56Gunnison County37+0.6
57Lake County36.9+0.1
57Morgan County36.90
59Larimer County36.6+0.3
60Denver County35.2+0.3
60Weld County35.2+0.2
62El Paso County35+0.3
63Adams County34.6+0.2
64Alamosa County33.1+0.9

Other periods

About this ranking

Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b01002.dat. Retrieved 2026-10-08.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Colorado by median age using official data, and cite the source.
rank_places {"indicator":"median_age","level":"province","within":"Colorado","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=median_age&level=province&within=Colorado&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest median age?

Custer County, with 58.6 years in 2023, according to the U.S. Census Bureau.

Which county has the lowest median age?

Alamosa County, with 33.1 years in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B01002: median age, total population. Retrieved 2026-10-08.

Median age: other rankings

Counties in Colorado: more rankings