Ranking of Colorado Counties By White Alone Population Aged 25 years and above with an Educational attainment of Less than High School Diploma in 2021 (ACS-5Yrs)
Updated on September 5, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the Colorado White Alone population (aged 25 years and above) who had an educational attainment of Less than High School Diploma was 180,435. Among all Colorado counties, Adams County had the highest White Alone population (aged 25 years and above) with an educational attainment of Less than High School Diploma (29,401), followed by Denver County (23,925), and Weld County (17,480).
The chart below shows the top 10 Colorado counties, and the table below shows the ranking of all Colorado counties.
You can see similar information for other educational attainments, and for other races and ethnicities.
You can also see similar information for other states and for the United States.
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Related Topics: Colorado ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Colorado Counties By White Alone Population (Aged 25yrs+) with an Educational Attainment of Less than High School Diploma in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Adams County | 29401 |
| 2 | Denver County | 23925 |
| 3 | Weld County | 17480 |
| 4 | El Paso County | 16117 |
| 5 | Jefferson County | 14960 |
| 6 | Arapahoe County | 14876 |
| 7 | Mesa County | 7592 |
| 8 | Pueblo County | 7381 |
| 9 | Larimer County | 6620 |
| 10 | Boulder County | 5635 |
| 11 | Fremont County | 3087 |
| 12 | Douglas County | 2919 |
| 13 | Garfield County | 2470 |
| 14 | Montrose County | 2408 |
| 15 | Delta County | 2132 |
| 16 | Morgan County | 2093 |
| 17 | Eagle County | 1815 |
| 18 | Montezuma County | 1355 |
| 19 | Otero County | 1244 |
| 20 | Logan County | 1111 |
| 21 | La Plata County | 990 |
| 22 | Summit County | 964 |
| 23 | Prowers County | 921 |
| 24 | Broomfield County | 908 |
| 25 | Las Animas County | 686 |
| 26 | Moffat County | 606 |
| 27 | Alamosa County | 578 |
| 28 | Chaffee County | 571 |
| 29 | Yuma County | 535 |
| 30 | Grand County | 531 |
| 31 | Rio Grande County | 510 |
| 32 | Saguache County | 502 |
| 33 | Lake County | 499 |
| 34 | Routt County | 473 |
| 35 | Elbert County | 452 |
| 36 | Kit Carson County | 416 |
| 37 | Bent County | 404 |
| 38 | Crowley County | 398 |
| 38 | Lincoln County | 398 |
| 39 | Teller County | 358 |
| 40 | Conejos County | 331 |
| 41 | Rio Blanco County | 302 |
| 42 | Archuleta County | 294 |
| 43 | Pitkin County | 292 |
| 44 | Baca County | 271 |
| 44 | Park County | 271 |
| 45 | Phillips County | 263 |
| 45 | Washington County | 263 |
| 46 | Gilpin County | 256 |
| 47 | Costilla County | 249 |
| 48 | Huerfano County | 226 |
| 49 | Clear Creek County | 190 |
| 50 | Gunnison County | 176 |
| 51 | Sedgwick County | 164 |
| 52 | Jackson County | 148 |
| 53 | San Miguel County | 85 |
| 54 | Dolores County | 70 |
| 55 | Cheyenne County | 65 |
| 56 | Custer County | 60 |
| 57 | Ouray County | 55 |
| 58 | Hinsdale County | 27 |
| 59 | Kiowa County | 26 |
| 60 | San Juan County | 19 |
| 61 | Mineral County | 11 |