Johnstown, CO ZIP code
The ZIP code for Johnstown, Colorado is 80534. It is in Weld County.
- Population in these ZIPs
- 20,502
- Avg. median income
- $129,000population-weighted
- Typical home value
- $504,400population-weighted
- Metro area
- Greeley, CO
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Johnstown, CO ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 80534 | 20,502 | $129,024 | $504,400 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
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Frequently asked questions
What is the ZIP code for Johnstown, CO?
The ZIP code for Johnstown, CO is 80534.
What county is Johnstown, Colorado in?
Johnstown ZIP codes are in Weld County.