27 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 80123 | Littleton | 44,549 |
| 80401 | Golden | 43,811 |
| 80127 | Littleton | 43,494 |
| 80128 | Littleton | 36,712 |
| 80021 | Broomfield | 36,555 |
| 80003 | Arvada | 35,976 |
| 80228 | Denver | 34,942 |
| 80227 | Denver | 34,907 |
| 80004 | Arvada | 33,700 |
| 80226 | Denver | 31,573 |
| 80005 | Arvada | 28,459 |
| 80214 | Denver | 27,022 |
| 80033 | Wheat Ridge | 26,485 |
| 80232 | Denver | 23,050 |
| 80002 | Arvada | 21,270 |
| 80403 | Golden | 20,732 |
| 80215 | Denver | 19,839 |
| 80007 | Arvada | 19,078 |
| 80465 | Morrison | 16,582 |
| 80235 | Denver | 8,373 |
| 80433 | Conifer | 8,292 |
| 80470 | Pine | 3,608 |
| 80454 | Indian Hills | 986 |
| 80453 | Idledale | 297 |
| 80457 | Kittredge | 283 |
| 80425 | Buffalo Creek | 243 |
| 80419 | Golden | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 27 ZCTAs in Jefferson County, Colorado (US Census).