ZIP code ranking · CO
Most Populous ZIP Codes in CO
The top 25 ZIP codes ranked by population in CO. The ranking pulls from the latest available data; ZIPs with implausible or incomplete data are excluded.
| Rank | ZIP | Where | Population |
|---|---|---|---|
| 1 | 80134 | Parker, CO· Douglas County | 80,302 |
| 2 | 80013 | Aurora, CO· Arapahoe County | 73,248 |
| 3 | 80015 | Centennial, CO· Arapahoe County | 72,316 |
| 4 | 80016 | Aurora, CO· Arapahoe County | 68,268 |
| 5 | 80634 | Greeley, CO· Weld County | 65,622 |
| 6 | 80504 | Firestone, CO· Weld County | 63,451 |
| 7 | 80022 | Commerce City, CO· Adams County | 61,452 |
| 8 | 80219 | Denver, CO· Denver County | 59,523 |
| 9 | 80229 | Thornton, CO· Adams County | 55,092 |
| 10 | 80525 | Fort Collins, CO· Larimer County | 54,211 |
| 11 | 80020 | Broomfield, CO· Broomfield County | 54,201 |
| 12 | 80631 | Greeley, CO· Weld County | 53,722 |
| 13 | 80011 | Aurora, CO· Adams County | 53,695 |
| 14 | 80012 | Aurora, CO· Arapahoe County | 51,052 |
| 15 | 80538 | Loveland, CO· Larimer County | 50,110 |
| 16 | 80918 | Colorado Springs, CO· El Paso County | 50,005 |
| 17 | 80233 | Thornton, CO· Adams County | 48,441 |
| 18 | 80550 | Windsor, CO· Weld County | 46,456 |
| 19 | 80239 | Denver, CO· Denver County | 44,956 |
| 20 | 80126 | Highlands Ranch CDP, CO· Douglas County | 44,882 |
| 21 | 80602 | Thornton, CO· Adams County | 44,783 |
| 22 | 80123 | Columbine CDP, CO· Jefferson County | 44,549 |
| 23 | 80537 | Loveland, CO· Larimer County | 44,425 |
| 24 | 80526 | Fort Collins, CO· Larimer County | 44,326 |
| 25 | 80501 | Longmont, CO· Boulder County | 44,147 |