Youngest Cities in Colorado

The top 25 of 54 Colorado cities on GIS Map, ranked by lowest median age.

#	City	County	Median age	Population
1	Boulder	Boulder	28.8 years	106,433
2	Fountain	El Paso	30 years	29,300
3	Evans	Weld	30.8 years	22,396
4	Fort Collins	Larimer	30.9 years	170,229
5	Alamosa	Alamosa	31.2 years	9,879
6	Greeley	Weld	32.5 years	110,806
7	Dacono	Weld	33.8 years	6,530
8	Brighton	Adams	34 years	42,059
9	Golden	Jefferson	34.6 years	20,417
10	Thornton	Adams	34.7 years	144,187
11	Northglenn	Adams	34.8 years	38,014
12	Johnstown	Weld	34.9 years	18,883
13	Commerce City	Adams	35 years	66,445
14	Aurora	Arapahoe	35.3 years	394,432
15	Denver	Denver	35.3 years	718,877
16	Colorado Springs	El Paso	35.7 years	487,887
17	Firestone	Weld	35.9 years	18,049
18	Security-Widefield	El Paso	35.9 years	37,345
19	Parker	Douglas	36.2 years	61,783
20	Glenwood Springs	Garfield	36.3 years	10,241
21	Cortez	Montezuma	36.4 years	8,976
22	Frederick	Weld	36.4 years	16,651
23	Castle Rock	Douglas	36.5 years	79,123
24	Englewood	Arapahoe	37.4 years	34,129
25	Westminster	Adams	37.4 years	115,484

Top Colorado Counties

Counties ranked by lowest median age.

1. Alamosa County33.2 years 2. Adams County34.8 years 3. El Paso County35.1 years 4. Denver County35.3 years 5. Weld County35.3 years 6. Larimer County36.8 years 7. Arapahoe County37.3 years 8. Lake County37.3 years 9. Gunnison County37.5 years 10. Morgan County37.5 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, “Youngest Cities in Colorado”, https://gismap.land/rankings/colorado/youngest-cities. Figures from U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.

Youngest Cities in Colorado

Top Colorado Counties

More Colorado rankings