Data / Rankings / Median age / Counties in Colorado

Counties in Colorado by median age, 2024

Custer County had the highest median age of 64 counties in 2024, at 58.2 years. Alamosa County had the lowest, at 33.2 years. The median was 41.5 years and the figure for Colorado was 37.7 years. Source: the U.S. Census Bureau.

Highest58.2Custer County
Lowest33.2Alamosa County
Median41.564 counties
Colorado37.7History

Top 40 counties, 2024

CSVChart (SVG)

Custer CountyCuster County: 58.2 years58.2Dolores CountyDolores County: 56.7 years56.7Mineral CountyMineral County: 56.4 years56.4Ouray CountyOuray County: 55.4 years55.4Huerfano CountyHuerfano County: 55.3 years55.3Teller CountyTeller County: 52.2 years52.2Archuleta CountyArchuleta County: 52.1 years52.1Jackson CountyJackson County: 51.6 years51.6Park CountyPark County: 51.2 years51.2Costilla CountyCostilla County: 50.5 years50.5Saguache CountySaguache County: 49.6 years49.6Clear Creek CountyClear Creek County: 49.1 years49.1Chaffee CountyChaffee County: 48.7 years48.7Hinsdale CountyHinsdale County: 48.5 years48.5Delta CountyDelta County: 48.1 years48.1Gilpin CountyGilpin County: 47.2 years47.2Pitkin CountyPitkin County: 47.2 years47.2Las Animas CountyLas Animas County: 46.6 years46.6Montrose CountyMontrose County: 46.1 years46.1Grand CountyGrand County: 45.4 years45.4Kiowa CountyKiowa County: 45.4 years45.4Elbert CountyElbert County: 45 years45Fremont CountyFremont County: 44.7 years44.7Montezuma CountyMontezuma County: 44.5 years44.5Routt CountyRoutt County: 43.4 years43.4San Miguel CountySan Miguel County: 43.3 years43.3La Plata CountyLa Plata County: 43.2 years43.2Baca CountyBaca County: 43 years43Cheyenne CountyCheyenne County: 42.9 years42.9Sedgwick CountySedgwick County: 42.6 years42.6Otero CountyOtero County: 41.8 years41.8Rio Grande CountyRio Grande County: 41.7 years41.7Mesa CountyMesa County: 41.3 years41.3Washington CountyWashington County: 41.3 years41.3Lincoln CountyLincoln County: 40.9 years40.9Phillips CountyPhillips County: 40.9 years40.9Crowley CountyCrowley County: 40.8 years40.8Bent CountyBent County: 40.6 years40.6Conejos CountyConejos County: 40.6 years40.6Jefferson CountyJefferson County: 40.5 years40.5
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2024
years		Change on 2023
1Custer County58.2-0.4
2Dolores County56.7-0.5
3Mineral County56.4+2.7
4Ouray County55.4-0.2
5Huerfano County55.3+0.2
6Teller County52.2+0.2
7Archuleta County52.1-0.1
8Jackson County51.6+0.1
9Park County51.2-0.5
10Costilla County50.5-0.2
11Saguache County49.6-0.2
12Clear Creek County49.1-0.1
13Chaffee County48.7+1.1
14Hinsdale County48.5-6.3
15Delta County48.1-0.3
16Gilpin County47.2-1.5
16Pitkin County47.2-0.1
18Las Animas County46.6+0.1
19Montrose County46.1+0.4
20Grand County45.4-0.1
20Kiowa County45.4+1.5
22Elbert County45+0.2
23Fremont County44.7-0.2
24Montezuma County44.50
25Routt County43.4+0.8
26San Miguel County43.3+0.6
27La Plata County43.2+0.9
28Baca County430
29Cheyenne County42.9-0.1
30Sedgwick County42.6-0.3
31Otero County41.8+0.9
32Rio Grande County41.7-1.5
33Mesa County41.3+0.5
33Washington County41.3+0.1
35Lincoln County40.9+0.2
35Phillips County40.9+0.6
37Crowley County40.8+1.2
38Bent County40.6-1.1
38Conejos County40.6+1.8
40Jefferson County40.5+0.1
40Yuma County40.5+0.9
42Pueblo County40.40
43Moffat County40.1+2.2
44Eagle County39.7+0.4
45Douglas County39.6+0.1
46Kit Carson County39.5+0.5
46Summit County39.5+0.3
48Logan County39.2+0.1
49Broomfield County38.6-0.2
50Rio Blanco County37.8-1.3
51Boulder County37.7+0.2
51Prowers County37.7-0.8
53Garfield County37.6+0.4
54Gunnison County37.5+0.5
54Morgan County37.5+0.6
54San Juan County37.5-4.7
57Arapahoe County37.30
57Lake County37.3+0.4
59Larimer County36.8+0.2
60Denver County35.3+0.1
60Weld County35.3+0.1
62El Paso County35.1+0.1
63Adams County34.8+0.2
64Alamosa County33.2+0.1

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/2024/table-based-SF/data/5YRData/acsdt5y2024-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Custer County, with 58.2 years in 2024, according to the U.S. Census Bureau.

Which county has the lowest median age?

Alamosa County, with 33.2 years in 2024.

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