| ZIP Codes: | 30 ZIP Codes (19 Standard, 9 PO Box, 2 Unique) [See All] |
| Area Codes: | 303 / 719 / 720 / 983 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 11:52:49 PM |
| Population: | 690,454 [See All] |
| FIPS: | 08005 |
| CBSA: | Denver-Aurora-Centennial, CO |
| Land Area: | 1,061 sq mi |
| Water Area: | 11 sq mi |
| Coordinates: | 39.6516, -104.8233 |
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690,454 residents live across 30 ZIPs covering 1,061 sq mi, served by 6 distinct USPS-recognized cities.
Population moved from 616,189 to 690,454 from 2014 to 2024 — a +12.1% change. 16 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 80016 (Aurora, $150,492 median) and poorest ZIP 80010 (Aurora, $63,579) are 10.1 miles apart — a 2.4× income gap across local geography.
Median home values vary 2.9× across this county — from $318,400 in 80247 (Denver) to $916,500 in 80111 (Englewood).
Density varies 2284× across the county — from 5 people/sq mi in 80105 (Deer Trail) to 10,538 in 80247 (Denver).
Most of the decade's growth concentrated around Aurora — top growth ZIPs averaged +72.6% over the past ten years ( 80105 , 80018 and 80016 ).
Educational attainment ranges from 18.5% bachelor's+ in 80105 (Deer Trail) to 75.5% in 80111 (Englewood) — the breadth of educational profiles across the area.
Within Colorado, this is the #3 most populous of 65 counties and ranks #10 for median household income with the #15 fastest decade growth .
Weighted by population, the typical household earns about $101,920 across the county — reflecting what a typical resident sees, not a simple ZIP average.
44.2% of adults age 25+ hold a bachelor's degree or higher (210,444 of 475,907 reporting). The most-educated ZIPs cluster around Littleton.
19 Standard delivery, 9 PO Box only, 2 single-entity Unique ZIPs serve this county.
4 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 |
|---|---|---|---|---|---|---|
| 80013 | Aurora | Standard | 73,248 | $101,191 | 11.8 | 2.3% |
| 80015 | Aurora | Standard | 72,316 | $124,702 | 13.7 | 11.6% |
| 80016 | Aurora | Standard | 68,268 | $150,492 | 34.7 | 49.1% |
| 80011 | Aurora | Standard | 53,695 | $74,022 | 22.1 | 13.6% |
| 80012 | Aurora | Standard | 51,052 | $73,000 | 7.6 | 5.5% |
| 80010 | Aurora | Standard | 42,439 | $63,579 | 5.0 | -3.5% |
| 80017 | Aurora | Standard | 40,584 | $80,524 | 7.1 | 19.4% |
| 80014 | Aurora | Standard | 39,496 | $73,210 | 7.3 | 6.6% |
| 80112 | Englewood | Standard | 36,816 | $108,874 | 17.5 | 21.3% |
| 80122 | Littleton | Standard | 32,195 | $128,691 | 7.2 | 3.1% |
| 80111 | Englewood | Standard | 31,561 | $135,995 | 12.9 | 3.4% |
| 80247 | Denver | Standard | 29,760 | $64,498 | 2.8 | 16.3% |
| 80120 | Littleton | Standard | 29,725 | $94,296 | 8.8 | -0.8% |
| 80110 | Englewood | Standard | 23,825 | $85,900 | 6.6 | 11.0% |
| 80113 | Englewood | Standard | 22,976 | $96,590 | 7.7 | 8.6% |
| 80018 | Aurora | Standard | 19,072 | $136,895 | 31.7 | 81.4% |
| 80121 | Littleton | Standard | 18,029 | $142,056 | 7.1 | -3.2% |
| 80103 | Byers | Standard | 3,215 | $102,656 | 376.7 | 19.9% |
| 80105 | Deer Trail | Standard | 2,182 | $79,792 | 473.0 | 87.3% |
| 80150 | Englewood | PO Box | — | — | 0.0 | — |
| 80151 | Englewood | PO Box | — | — | 0.0 | — |
| 80044 | Aurora | PO Box | — | — | 0.0 | — |
| 80160 | Littleton | PO Box | — | — | 0.0 | — |
| 80166 | Littleton | Unique | — | — | 0.0 | — |
| 80165 | Littleton | Unique | — | — | 0.0 | — |
| 80046 | Aurora | PO Box | — | — | 0.0 | — |
| 80155 | Englewood | PO Box | — | — | 0.0 | — |
| 80161 | Littleton | PO Box | — | — | 0.0 | — |
| 80041 | Aurora | PO Box | — | — | 0.0 | — |
| 80047 | Aurora | PO Box | — | — | 0.0 | — |