ZIP code · Johnstown · Colorado · United States
ZIP code 80534 — Johnstown
ZIP code 80534 serves Johnstown, Colorado.
- Postal code
- 80534Single source Value from one source, not cross-checked.
- City
- Johnstown
- County
- Weld
- State
- Colorado
- Country
- United States
- Coordinates
- 40.3355, -104.9236 — precision precise (locality)
View on OpenStreetMap - Population
- 19,696 (ZCTA, ACS 5-year)
- Median household income
- $132,320
- Median age
- 34.3
- Time zone
- America/Denver (UTC−7 / UTC−6 DST)
- Area code
- 970 (from the nearest rate centre)Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS). Data generated on 2026-08-21. Methodology · Report an error on this page