27 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 80123 | Littleton | 45,364 |
| 80127 | Littleton | 43,826 |
| 80401 | Golden | 43,429 |
| 80128 | Littleton | 36,859 |
| 80021 | Broomfield | 35,562 |
| 80003 | Arvada | 35,381 |
| 80227 | Denver | 34,946 |
| 80228 | Denver | 34,677 |
| 80004 | Arvada | 34,580 |
| 80226 | Denver | 32,237 |
| 80005 | Arvada | 28,883 |
| 80033 | Wheat Ridge | 26,841 |
| 80214 | Denver | 26,759 |
| 80232 | Denver | 22,398 |
| 80002 | Arvada | 20,975 |
| 80403 | Golden | 20,789 |
| 80215 | Denver | 19,684 |
| 80007 | Arvada | 18,290 |
| 80465 | Morrison | 16,277 |
| 80433 | Conifer | 8,392 |
| 80235 | Denver | 8,374 |
| 80470 | Pine | 3,888 |
| 80454 | Indian Hills | 1,320 |
| 80425 | Buffalo Creek | 325 |
| 80453 | Idledale | 306 |
| 80457 | Kittredge | 298 |
| 80419 | Golden | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 27 ZCTAs in Jefferson County, Colorado (US Census).