First three digits · Colorado
ZIP Codes Starting with
32 ZIP codes start with 806, sorted at the Denver, CO (SCF 800) sectional center (USPS labeling list L005, effective October 1, 2026) in Colorado: 27 residential ZIP codes across 3 counties and 5 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 806 mean?
The first digit, 8, is one of ten national areas (Arizona, Colorado, Idaho, New Mexico, Nevada, Utah and Wyoming). The first three, 806, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 806 to the Denver, CO (SCF 800) facility. The last two digits pick the delivery area. By residents, the largest town names among the 806 ZIP codes are Greeley, Brighton, Evans, Fort Lupton, Henderson and Eaton.
The same facility sorts 8 prefixes, 332 ZIP codes in all: 800, 801, 802, 803, 804, 805, 806, 807.
Where are the 806 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 806
| County | ||||||
|---|---|---|---|---|---|---|
| 80601 | Brighton | Adams County | 42,127 | 1,608 | $105k | $498k |
| 80602 | Brighton | Adams County | 44,783 | 1,457 | $152k | $667k |
| 80603 | Brighton | Adams County | 16,811 | 227 | $118k | $492k |
| 80610 | Ault | Weld County | 4,132 | 23 | $92k | $425k |
| 80611 | Briggsdale | Weld County | 557 | 1 | $79k | $415k |
| 80612 | Carr | Weld County | 494 | 2 | – | $637k |
| 80614 | Eastlake | Adams County | PO Box or unique | – | – | – |
| 80615 | Eaton | Weld County | 9,060 | 86 | $107k | $522k |
| 80620 | Evans | Weld County | 20,798 | 3,514 | $74k | $342k |
| 80621 | Fort Lupton | Weld County | 15,060 | 119 | $90k | $463k |
| 80622 | Galeton | Weld County | 282 | 25 | $139k | – |
| 80623 | Gilcrest | Weld County | 1,026 | 1,531 | – | $322k |
| 80624 | Gill | Weld County | 685 | 9 | $81k | $481k |
| 80631 | Greeley | Weld County | 53,722 | 519 | $55k | $337k |
| 80632 | Greeley | Weld County | PO Box or unique | – | – | – |
| 80633 | Greeley | Weld County | PO Box or unique | – | – | – |
| 80634 | Greeley | Weld County | 65,622 | 1,712 | $83k | $433k |
| 80638 | Greeley | Weld County | PO Box or unique | – | – | – |
| 80639 | Greeley | Weld County | PO Box or unique | – | – | – |
| 80640 | Henderson | Adams County | 13,818 | 1,062 | $117k | $497k |
| 80642 | Hudson | Weld County | 4,466 | 45 | $105k | $620k |
| 80643 | Keenesburg | Weld County | 5,119 | 24 | $98k | $475k |
| 80644 | Kersey | Weld County | 2,124 | 13 | $98k | $409k |
| 80645 | La Salle | Weld County | 4,917 | 53 | $88k | $427k |
| 80646 | Lucerne | Weld County | no residents | 0 | – | – |
| 80648 | Nunn | Weld County | 902 | 6 | $94k | $380k |
| 80649 | Orchard | Weld County | 263 | 1 | – | $527k |
| 80650 | Pierce | Weld County | 2,192 | 39 | $57k | $393k |
| 80651 | Platteville | Weld County | 4,837 | 51 | $82k | $475k |
| 80652 | Roggen | Weld County | 299 | 2 | $73k | $472k |
| 80653 | Weldona | Morgan County | 939 | 7 | $52k | $361k |
| 80654 | Wiggins | Morgan County | 3,657 | 16 | $92k | $434k |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.