County ZIP codes · Colorado · FIPS 08059
Jefferson County, CO ZIP Codes
Jefferson County, Colorado has 40 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 33 residential and 7 for PO boxes or a single organization. 27 of the residential ones lie mainly in Jefferson County and 6 mainly in a neighboring county; 15 cross the county line. Median household income ranges from $70,484 in 80235 (Denver) to $176,122 in 80007 (Arvada) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Jefferson County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $91,464 and $134,402.
They carry 17 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 33 residential ZIP codes in Jefferson County
27 ZIP codes lie mainly in Jefferson County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 80123 | Littleton | 44,549 | 3,706 | $106k | $620k | 50% |
| 80401 | Golden | 43,811 | 893 | $118k | $805k | 100% |
| 80127 | Littleton | 43,494 | 655 | $137k | $693k | 100% |
| 80128 | Littleton | 36,712 | 2,923 | $121k | $586k | 90% |
| 80021 | Broomfield | 36,555 | 2,211 | $110k | $568k | 66% |
| 80003 | Arvada | 35,976 | 5,467 | $92k | $535k | 86% |
| 80228 | Denver | 34,942 | 3,049 | $114k | $641k | 100% |
| 80227 | Denver | 34,907 | 3,228 | $90k | $559k | 86% |
| 80004 | Arvada | 33,700 | 4,713 | $104k | $617k | 100% |
| 80226 | Denver | 31,573 | 3,892 | $82k | $568k | 99% |
| 80005 | Arvada | 28,459 | 2,431 | $137k | $650k | 100% |
| 80214 | Denver | 27,022 | 5,788 | $76k | $559k | 99% |
| 80033 | Wheat Ridge | 26,485 | 3,176 | $90k | $610k | 100% |
| 80232 | Denver | 23,050 | 5,935 | $96k | $522k | 99% |
| 80002 | Arvada | 21,270 | 3,274 | $93k | $559k | 96% |
| 80403 | Golden | 20,732 | 146 | $151k | $838k | 82% |
| 80215 | Denver | 19,839 | 3,635 | $85k | $650k | 100% |
| 80007 | Arvada | 19,078 | 762 | $176k | $872k | 100% |
| 80465 | Morrison | 16,582 | 382 | $132k | $685k | 100% |
| 80235 | Denver | 8,373 | 2,466 | $71k | $547k | 75% |
| 80433 | Conifer | 8,292 | 125 | $134k | $773k | 100% |
| 80470 | Pine | 3,608 | 35 | $136k | $681k | 81% |
| 80454 | Indian Hills | 986 | 196 | $179k | $789k | 100% |
| 80453 | Idledale | 297 | 564 | – | $452k | 100% |
| 80457 | Kittredge | 283 | 460 | $235k | $464k | 100% |
| 80425 | Buffalo Creek | 243 | 5 | $82k | $672k | 100% |
| 80419 | Golden | no residents | 0 | – | – | 100% |
Partly in Jefferson County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 80439 | Evergreen | 24,610 | 146 | $156k | $900k | 42% |
| 80212 | Denver | 20,746 | 5,823 | $125k | $745k | 19% |
| 80135 | Sedalia | 4,141 | 11 | $136k | $881k | 17% |
| 80020 | Broomfield | 54,201 | 2,742 | $117k | $602k | 13% |
| 80031 | Westminster | 35,584 | 4,222 | $107k | $535k | 10% |
| 80421 | Bailey | 8,536 | 82 | $99k | $579k | 2% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
18 ZIP codes of Jefferson County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Jefferson | Elsewhere |
|---|---|---|
| 80020 | 13% | Broomfield County 60%; Boulder County 25%; Adams County 2% |
| 80123 | 50% | Arapahoe County 31%; Denver County 19% |
| 80128 | 90% | Arapahoe County 10% |
| 80021 | 66% | Broomfield County 34% |
| 80003 | 86% | Adams County 14% |
| 80031 | 10% | Adams County 90% |
| 80227 | 86% | Denver County 14% |
| 80226 | 99% | |
| 80214 | 99% | |
| 80439 | 42% | Clear Creek County 58% |
| 80232 | 99% | |
| 80002 | 96% | Adams County 4% |
| 80212 | 19% | Denver County 74%; Adams County 7% |
| 80403 | 82% | Gilpin County 12%; Boulder County 5% |
| 80421 | 2% | Park County 98% |
| 80235 | 75% | Denver County 25% |
| 80135 | 17% | Douglas County 83% |
| 80470 | 81% | Park County 19% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Jefferson County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Jefferson County's ZIP codes use 4 prefixes: 800, 801, 802 and 804.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 800 | Denver, CO (SCF 800) | 12 | 40 |
| 801 | Denver, CO (SCF 800) | 5 | 44 |
| 802 | Denver, CO (SCF 800) | 9 | 67 |
| 804 | Denver, CO (SCF 800) | 14 | 63 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.