| ZIP Codes: | 35 ZIP Codes (23 Standard, 11 PO Box, 1 Unique) [See All] |
| Area Codes: | 303 / 720 / 983 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 2:11:33 PM |
| Population: | 625,428 [See All] |
| FIPS: | 08059 |
| CBSA: | Denver-Aurora-Centennial, CO |
| Land Area: | 777 sq mi |
| Water Area: | 11 sq mi |
| Coordinates: | 39.6929, -105.1726 |
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625,428 residents live across 35 ZIPs covering 777 sq mi, served by 14 distinct USPS-recognized cities.
Population moved from 588,170 to 625,428 from 2014 to 2024 — a +6.3% change. 19 ZIPs gained residents, 9 lost.
The county's wealthiest ZIP 80007 (Arvada, $176,122 median) and poorest ZIP 80235 (Denver, $70,484) are 16.4 miles apart — a 2.5× income gap across local geography.
Median home values vary 1.7× across this county — from $521,600 in 80232 (Denver) to $900,300 in 80439 (Evergreen).
Density varies 115× across the county — from 50 people/sq mi in 80470 (Pine) to 5,792 in 80214 (Denver).
Most of the decade's growth concentrated around Arvada — top growth ZIPs averaged +69.3% over the past ten years ( 80007 , 80021 and 80002 ).
Educational attainment ranges from 35.7% bachelor's+ in 80003 (Arvada) to 71.6% in 80439 (Evergreen) — the breadth of educational profiles across the area.
Within Colorado, this is the #4 most populous of 65 counties and ranks #5 for median household income with the #31 fastest decade growth .
On the national stage, Jefferson County is ranks #93 for income .
Hosts 1 single-entity Unique ZIP: 80419Jefferson County .
Weighted by population, the typical household earns about $112,047 across the county — reflecting what a typical resident sees, not a simple ZIP average.
51.8% of adults age 25+ hold a bachelor's degree or higher (240,615 of 464,675 reporting).
23 Standard delivery, 11 PO Box only, 1 single-entity Unique ZIPs serve this county.
5 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 80123 | Littleton | Standard | 44,549 | $105,932 | 13.9 | -0.5% |
| 80401 | Golden | Standard | 43,811 | $118,039 | 50.0 | 11.4% |
| 80127 | Littleton | Standard | 43,494 | $137,040 | 67.3 | -2.4% |
| 80128 | Littleton | Standard | 36,712 | $121,436 | 12.4 | 2.9% |
| 80021 | Broomfield | Standard | 36,555 | $110,038 | 19.0 | 19.1% |
| 80003 | Arvada | Standard | 35,976 | $91,464 | 7.1 | 0.5% |
| 80228 | Denver | Standard | 34,942 | $113,977 | 11.6 | 11.1% |
| 80227 | Denver | Standard | 34,907 | $90,316 | 9.1 | 2.2% |
| 80004 | Arvada | Standard | 33,700 | $103,659 | 7.2 | -8.1% |
| 80226 | Denver | Standard | 31,573 | $82,300 | 7.5 | -0.1% |
| 80005 | Arvada | Standard | 28,459 | $136,821 | 11.4 | 3.4% |
| 80214 | Denver | Standard | 27,022 | $75,575 | 4.7 | 5.6% |
| 80033 | Wheat Ridge | Standard | 26,485 | $89,627 | 9.6 | 6.6% |
| 80439 | Evergreen | Standard | 24,610 | $156,218 | 126.5 | 3.6% |
| 80232 | Denver | Standard | 23,050 | $96,217 | 4.1 | 6.5% |
| 80002 | Arvada | Standard | 21,270 | $93,362 | 5.8 | 18.6% |
| 80403 | Golden | Standard | 20,732 | $151,276 | 137.6 | 13.0% |
| 80215 | Denver | Standard | 19,839 | $85,190 | 5.6 | 8.8% |
| 80007 | Arvada | Standard | 19,078 | $176,122 | 19.2 | 170.2% |
| 80465 | Morrison | Standard | 16,582 | $132,292 | 45.9 | 3.6% |
| 80235 | Denver | Standard | 8,373 | $70,484 | 3.8 | 6.1% |
| 80433 | Conifer | Standard | 8,292 | $134,402 | 72.0 | -0.7% |
| 80470 | Pine | Standard | 3,608 | $135,682 | 71.8 | 1.6% |
| 80454 | Indian Hills | PO Box | 986 | $178,980 | 5.1 | -12.3% |
| 80453 | Idledale | PO Box | 297 | — | 0.5 | 11.2% |
| 80457 | Kittredge | PO Box | 283 | $235,160 | 0.7 | -57.3% |
| 80425 | Buffalo Creek | PO Box | 243 | $82,188 | 46.9 | -0.4% |
| 80419 | Golden | Unique | 0 | — | 0.1 | -100.0% |
| 80402 | Golden | PO Box | — | — | 0.0 | — |
| 80225 | Denver | PO Box | — | — | 0.6 | — |
| 80001 | Arvada | PO Box | — | — | 0.0 | — |
| 80034 | Wheat Ridge | PO Box | — | — | 0.0 | — |
| 80006 | Arvada | PO Box | — | — | 0.0 | — |
| 80162 | Littleton | PO Box | — | — | 0.0 | — |
| 80437 | Evergreen | PO Box | — | — | 0.0 | — |