Most populated ZIP codes in Colorado
The ZIP codes in Colorado with the most residents.
| Rank | ZIP code | City | County | Population | Population |
|---|
| 1 | 80134 | Parker, CO | Douglas County | 80,302 | 80,302 |
| 2 | 80013 | Aurora, CO | Arapahoe County | 73,248 | 73,248 |
| 3 | 80015 | Aurora, CO | Arapahoe County | 72,316 | 72,316 |
| 4 | 80016 | Aurora, CO | Arapahoe County | 68,268 | 68,268 |
| 5 | 80634 | Greeley, CO | Weld County | 65,622 | 65,622 |
| 6 | 80504 | Longmont, CO | Weld County | 63,451 | 63,451 |
| 7 | 80022 | Commerce City, CO | Adams County | 61,452 | 61,452 |
| 8 | 80219 | Denver, CO | Denver County | 59,523 | 59,523 |
| 9 | 80229 | Denver, CO | Adams County | 55,092 | 55,092 |
| 10 | 80525 | Fort Collins, CO | Larimer County | 54,211 | 54,211 |
| 11 | 80020 | Broomfield, CO | Broomfield County | 54,201 | 54,201 |
| 12 | 80631 | Greeley, CO | Weld County | 53,722 | 53,722 |
| 13 | 80011 | Aurora, CO | Adams County | 53,695 | 53,695 |
| 14 | 80012 | Aurora, CO | Arapahoe County | 51,052 | 51,052 |
| 15 | 80538 | Loveland, CO | Larimer County | 50,110 | 50,110 |
| 16 | 80918 | Colorado Springs, CO | El Paso County | 50,005 | 50,005 |
| 17 | 80233 | Denver, CO | Adams County | 48,441 | 48,441 |
| 18 | 80550 | Windsor, CO | Weld County | 46,456 | 46,456 |
| 19 | 80239 | Denver, CO | Denver County | 44,956 | 44,956 |
| 20 | 80126 | Littleton, CO | Douglas County | 44,882 | 44,882 |
| 21 | 80602 | Brighton, CO | Adams County | 44,783 | 44,783 |
| 22 | 80123 | Littleton, CO | Jefferson County | 44,549 | 44,549 |
| 23 | 80537 | Loveland, CO | Larimer County | 44,425 | 44,425 |
| 24 | 80526 | Fort Collins, CO | Larimer County | 44,326 | 44,326 |
| 25 | 80501 | Longmont, CO | Boulder County | 44,147 | 44,147 |
| 26 | 80401 | Golden, CO | Jefferson County | 43,811 | 43,811 |
| 27 | 80127 | Littleton, CO | Jefferson County | 43,494 | 43,494 |
| 28 | 80010 | Aurora, CO | Arapahoe County | 42,439 | 42,439 |
| 29 | 80601 | Brighton, CO | Adams County | 42,127 | 42,127 |
| 30 | 80249 | Denver, CO | Denver County | 41,590 | 41,590 |
| 31 | 80916 | Colorado Springs, CO | El Paso County | 41,104 | 41,104 |
| 32 | 80017 | Aurora, CO | Arapahoe County | 40,584 | 40,584 |
| 33 | 80524 | Fort Collins, CO | Larimer County | 40,030 | 40,030 |
| 34 | 80221 | Denver, CO | Adams County | 39,718 | 39,718 |
| 35 | 80014 | Aurora, CO | Arapahoe County | 39,496 | 39,496 |
| 36 | 80210 | Denver, CO | Denver County | 39,113 | 39,113 |
| 37 | 80516 | Erie, CO | Weld County | 39,048 | 39,048 |
| 38 | 80521 | Fort Collins, CO | Larimer County | 38,776 | 38,776 |
| 39 | 80104 | Castle Rock, CO | Douglas County | 38,479 | 38,479 |
| 40 | 80211 | Denver, CO | Denver County | 38,177 | 38,177 |
| 41 | 80906 | Colorado Springs, CO | El Paso County | 37,502 | 37,502 |
| 42 | 80220 | Denver, CO | Denver County | 37,203 | 37,203 |
| 43 | 80920 | Colorado Springs, CO | El Paso County | 36,923 | 36,923 |
| 44 | 80138 | Parker, CO | Douglas County | 36,895 | 36,895 |
| 45 | 80112 | Englewood, CO | Arapahoe County | 36,816 | 36,816 |
| 46 | 80108 | Castle Rock, CO | Douglas County | 36,730 | 36,730 |
| 47 | 80128 | Littleton, CO | Jefferson County | 36,712 | 36,712 |
| 48 | 80021 | Broomfield, CO | Jefferson County | 36,555 | 36,555 |
| 49 | 80003 | Arvada, CO | Jefferson County | 35,976 | 35,976 |
| 50 | 80231 | Denver, CO | Denver County | 35,883 | 35,883 |
Source: American Community Survey 2020–2024 5-year estimates. Only ZIP codes with a delivery area are ranked. Methodology
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