Westminster, CO ZIP Codes
Westminster, Colorado has 6 ZIP codes: 4 for street addresses (, , and ) and 2 for PO boxes ( and ).
Your street decides which one you use.
Which Westminster ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Westminster ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
80035 and 80036 have no area on the map: they are PO box or single-organization ZIP codes. Dashed line: Westminster city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Westminster ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 80021 | street delivery; mail may be addressed to Broomfield Broomfield Eagle View |
| 80030 | street delivery Westminster |
| 80031 | street delivery Westminster |
| 80035 | PO boxes at the Westminster post office Westminster |
| 80036 | PO boxes at the Harris Park post office Harris Park |
| 80234 | street delivery; mail may be addressed to Denver Northview |
ZIP codes from nearby towns that reach into Westminster
- 80020, mailing town Broomfield, covers 10 percent of Westminster
- 80005, mailing town Arvada, covers 9 percent of Westminster
- 80023, mailing town Broomfield, covers 5 percent of Westminster
- 80003, mailing town Arvada, covers 3 percent of Westminster
Why your mail may say Westminster when you live outside it
Westminster ZIP codes also cover Northglenn and Shaw Heights, so a letter addressed to Westminster can go to a home outside the city limits.
The reverse happens too: parts of Westminster use 80020, 80005, 80023 and 80003, which mail under a neighboring town's name.
A ZIP code does not set your city, school district or tax. Adams County property records show which city you are in.
Westminster ZIP code questions
What is the main ZIP code for Westminster?
80030, the ZIP code of the main Westminster post office at 3051 W 105th Ave.
Which Westminster ZIP codes are for PO boxes only?
80035 and 80036. Mail to them goes to boxes at the post office, not to street addresses.
What county is Westminster in?
Adams County, with parts in Jefferson County.
ZIP codes for towns near Westminster
More towns near Westminster: Erie, Denver, Lakewood, Commerce City, Boulder, Brighton, Englewood, Dakota Ridge, Longmont.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections