How to use this list
Counties are sorted alphabetically. Use ZIP count and population to spot larger counties, then open a county for its ZIP roster and income/housing averages.
Colorado counties
64 counties · 528 ZIP codes · population 5,811,179 . Select a county to open its ZIP table and local summary.
Related pages
Also see the Colorado overview, cities, rankings, and congressional districts.
| County | ZIP codes | Population | Avg. income |
|---|---|---|---|
| Adams County | 20 | 545,888 | $94,981 |
| Alamosa County | 3 | 16,551 | $57,547 |
| Arapahoe County | 17 | 601,156 | $103,941 |
| Archuleta County | 3 | 13,302 | $70,975 |
| Baca County | 6 | 3,481 | $39,832 |
| Bent County | 4 | 6,133 | $52,662 |
| Boulder County | 18 | 285,296 | $111,732 |
| Broomfield County | 2 | 80,055 | $137,005 |
| Chaffee County | 6 | 19,932 | $80,811 |
| Cheyenne County | 4 | 1,730 | $60,563 |
| Clear Creek County | 6 | 30,425 | $84,872 |
| Conejos County | 6 | 5,988 | $54,396 |
| Costilla County | 6 | 4,948 | $42,676 |
| Crowley County | 4 | 5,695 | $46,805 |
| Custer County | 2 | 4,929 | $71,943 |
| Delta County | 6 | 30,070 | $62,177 |
| Denver County | 31 | 719,028 | $95,065 |
| Dolores County | 5 | 7,804 | $69,906 |
| Douglas County | 14 | 365,049 | $145,058 |
| Eagle County | 10 | 43,274 | $88,463 |
| El Paso County | 41 | 731,825 | $94,721 |
| Elbert County | 7 | 24,323 | $102,033 |
| Fremont County | 9 | 49,450 | $56,662 |
| Garfield County | 6 | 48,212 | $88,549 |
| Gilpin County | 3 | 5,292 | $73,049 |
| Grand County | 8 | 15,006 | $86,113 |
| Gunnison County | 10 | 16,527 | $102,029 |
| Hinsdale County | 1 | 845 | $67,750 |
| Huerfano County | 4 | 8,660 | $66,322 |
| Jackson County | 4 | 1,422 | $43,803 |
| Jefferson County | 27 | 600,660 | $109,711 |
| Kiowa County | 4 | 1,366 | $56,331 |
| Kit Carson County | 6 | 7,149 | $61,093 |
| La Plata County | 5 | 56,822 | $83,936 |
| Lake County | 2 | 7,411 | $84,804 |
| Larimer County | 18 | 352,692 | $94,102 |
| Las Animas County | 9 | 14,351 | $43,397 |
| Lincoln County | 7 | 6,868 | $52,374 |
| Logan County | 8 | 21,056 | $69,767 |
| Mesa County | 17 | 156,431 | $83,964 |
| Mineral County | 1 | 786 | $52,461 |
| Moffat County | 5 | 13,262 | $54,422 |
| Montezuma County | 7 | 21,036 | $71,119 |
| Montrose County | 8 | 44,484 | $55,446 |
| Morgan County | 7 | 29,450 | $75,973 |
| Otero County | 5 | 17,120 | $51,975 |
| Ouray County | 2 | 4,401 | $85,199 |
| Park County | 10 | 15,747 | $80,563 |
| Phillips County | 4 | 4,805 | $75,613 |
| Pitkin County | 7 | 30,694 | $104,274 |
| Prowers County | 4 | 11,289 | $41,794 |
| Pueblo County | 12 | 168,417 | $59,570 |
| Rio Blanco County | 3 | 20,481 | $75,816 |
| Rio Grande County | 3 | 11,245 | $64,909 |
| Routt County | 9 | 24,978 | $100,535 |
| Saguache County | 6 | 6,776 | $51,211 |
| San Juan County | 1 | 626 | $72,639 |
| San Miguel County | 5 | 8,634 | $88,841 |
| Sedgwick County | 3 | 2,341 | $56,728 |
| Summit County | 4 | 31,624 | $103,232 |
| Teller County | 5 | 25,516 | $68,072 |
| Washington County | 6 | 4,324 | $52,777 |
| Weld County | 35 | 386,260 | $91,574 |
| Yuma County | 7 | 9,781 | $79,422 |
Frequently asked questions
- How many counties are listed for Colorado?
- US5 currently lists 64 counties with published ZIP coverage in Colorado. Counts can change as geography publishes update.
- What happens when I open a county?
- Each county page shows ZIP totals, income and housing averages, and a ZIP table. From there you can open any ZIP for a full demographics dashboard.