ZIP code · Johnstown · Colorado · United States

ZIP code 80534 — Johnstown

ZIP code 80534 serves Johnstown, Colorado.

Postal code
80534
Single source Value from one source, not cross-checked.
City
Johnstown
County
Weld FIPS 08123
State
Colorado
Country
United States
Coordinates
40.3355, -104.9236 — precision precise (locality)
View on OpenStreetMap
Population
19,696 (ZCTA, ACS 5-year)
Population density
410 / sq mi
Land area
48.1 sq mi (124.5 km²) (ZCTA, ACS 5-year)
Median household income
$132,320
Per-capita income
$49,924
Median age
34.3
Households
7,084
Housing units
7,137
Median home value
$509,500
Median gross rent
$1,778 / month
Congressional district
CO-8 (119th Congress)
USDA hardiness zone
5b (-15 to -10 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
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.

Climate — monthly normals

Warmest month Jul (avg high 89°F), coldest Jan (avg low 13°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F444656627183898779655344
Avg low °F131523314049555344322113
Precip in0.50.61.32.22.71.61.51.31.41.20.80.6

NOAA 1991–2020 climate normals from the nearest station: LOVELAND 2N (10.9 mi) · NOAA NCEI

Places in ZIP 80534

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

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) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page