Johnstown Colorado ZIP Codes
Johnstown holds a single ZIP code.
Every ZIP code in Johnstown
| ZIP code | County |
|---|---|
| 80534 | Weld County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Johnstown codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Johnstown. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Johnstown ZIP code begins 805. Those first three digits identify the sectional center facility that processes mail for this part of Colorado. Statewide that range covers 42 ZIP codes, so Johnstown accounts for 2% of it.
Every Colorado ZIP prefix and the region it covers →
Area codes covering Johnstown
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Johnstown occupies.
Johnstown Colorado area codes in full →
Where Johnstown's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Johnstown
| City | Distance | ZIP codes |
|---|---|---|
| Milliken Colorado ZIP codes | 2.8 mi | 1 ZIP code |
| Berthoud Colorado ZIP codes | 3.3 mi | 1 ZIP code |
| Mead Colorado ZIP codes | 6.9 mi | 1 ZIP code |
| Gilcrest Colorado ZIP codes | 7.0 mi | 1 ZIP code |
| Platteville Colorado ZIP codes | 7.1 mi | 1 ZIP code |
| Evans Colorado ZIP codes | 9.1 mi | 1 ZIP code |
| Greeley Colorado ZIP codes | 11 mi | 6 ZIP codes |
| Firestone Colorado ZIP codes | 11 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.