First three digits · Colorado
ZIP Codes Starting with
40 ZIP codes start with 800, sorted at the Denver, CO (SCF 800) sectional center (USPS labeling list L005, effective October 1, 2026) in Colorado: 27 residential ZIP codes across 5 counties and 13 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 800 mean?
The first digit, 8, is one of ten national areas (Arizona, Colorado, Idaho, New Mexico, Nevada, Utah and Wyoming). The first three, 800, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 800 to the Denver, CO (SCF 800) facility. The last two digits pick the delivery area. By residents, the largest town names among the 800 ZIP codes are Aurora, Arvada, Broomfield, Commerce City, Westminster and Louisville.
The same facility sorts 8 prefixes, 332 ZIP codes in all: 800, 801, 802, 803, 804, 805, 806, 807.
Where are the 800 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 800
| County | ||||||
|---|---|---|---|---|---|---|
| 80001 | Arvada | Jefferson County | PO Box or unique | – | – | – |
| 80002 | Arvada | Jefferson County | 21,270 | 3,274 | $93k | $559k |
| 80003 | Arvada | Jefferson County | 35,976 | 5,467 | $92k | $535k |
| 80004 | Arvada | Jefferson County | 33,700 | 4,713 | $104k | $617k |
| 80005 | Arvada | Jefferson County | 28,459 | 2,431 | $137k | $650k |
| 80006 | Arvada | Jefferson County | PO Box or unique | – | – | – |
| 80007 | Arvada | Jefferson County | 19,078 | 762 | $176k | $872k |
| 80010 | Aurora | Arapahoe County | 42,439 | 8,258 | $64k | $425k |
| 80011 | Aurora | Adams County | 53,695 | 2,629 | $74k | $409k |
| 80012 | Aurora | Arapahoe County | 51,052 | 6,717 | $73k | $430k |
| 80013 | Aurora | Arapahoe County | 73,248 | 5,252 | $101k | $474k |
| 80014 | Aurora | Arapahoe County | 39,496 | 5,513 | $73k | $416k |
| 80015 | Aurora | Arapahoe County | 72,316 | 4,446 | $125k | $586k |
| 80016 | Aurora | Arapahoe County | 68,268 | 2,113 | $151k | $762k |
| 80017 | Aurora | Arapahoe County | 40,584 | 4,427 | $81k | $427k |
| 80018 | Aurora | Arapahoe County | 19,072 | 539 | $137k | $588k |
| 80019 | Aurora | Adams County | 7,900 | 282 | $129k | $561k |
| 80020 | Broomfield | Broomfield County | 54,201 | 2,742 | $117k | $602k |
| 80021 | Broomfield | Jefferson County | 36,555 | 2,211 | $110k | $568k |
| 80022 | Commerce City | Adams County | 61,452 | 772 | $104k | $485k |
| 80023 | Broomfield | Broomfield County | 27,143 | 1,471 | $158k | $869k |
| 80024 | Dupont | Adams County | 33 | 1,500 | – | – |
| 80025 | Eldorado Springs | Boulder County | 138 | 34 | $134k | – |
| 80026 | Lafayette | Boulder County | 32,701 | 1,453 | $120k | $706k |
| 80027 | Louisville | Boulder County | 34,127 | 1,832 | $154k | $890k |
| 80030 | Westminster | Adams County | 15,427 | 5,848 | $61k | $439k |
| 80031 | Westminster | Adams County | 35,584 | 4,222 | $107k | $535k |
| 80033 | Wheat Ridge | Jefferson County | 26,485 | 3,176 | $90k | $610k |
| 80034 | Wheat Ridge | Jefferson County | PO Box or unique | – | – | – |
| 80035 | Westminster | Adams County | PO Box or unique | – | – | – |
| 80036 | Westminster | Adams County | PO Box or unique | – | – | – |
| 80037 | Commerce City | Adams County | PO Box or unique | – | – | – |
| 80038 | Broomfield | Boulder County | PO Box or unique | – | – | – |
| 80040 | Aurora | Adams County | PO Box or unique | – | – | – |
| 80041 | Aurora | Arapahoe County | PO Box or unique | – | – | – |
| 80042 | Aurora | Adams County | PO Box or unique | – | – | – |
| 80044 | Aurora | Arapahoe County | PO Box or unique | – | – | – |
| 80045 | Aurora | Adams County | 1,676 | 1,875 | $50k | – |
| 80046 | Aurora | Arapahoe County | PO Box or unique | – | – | – |
| 80047 | Aurora | Arapahoe County | PO Box or unique | – | – | – |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.