ZIP code · Holyoke · Colorado · United States

ZIP code 80734 — Holyoke

ZIP code 80734 serves Holyoke, Colorado.

Postal code
80734
Single source Value from one source, not cross-checked.
City
Holyoke
County
Phillips FIPS 08095
State
Colorado
Country
United States
Coordinates
40.5825, -102.2825 — precision precise (locality)
View on OpenStreetMap
Population
2,976 (ZCTA, ACS 5-year)
Population density
6 / sq mi
Land area
481.9 sq mi (1,248.1 km²) (ZCTA, ACS 5-year)
Median household income
$56,214
Per-capita income
$48,416
Median age
38.9
Households
1,194
Housing units
1,356
Median home value
$263,800
Median gross rent
$1,000 / month
Congressional district
CO-4 (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
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 88°F), coldest Jan (avg low 13°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F424454627183888679655342
Avg low °F131523314353595647332113
Precip in0.30.50.91.92.82.82.82.41.41.20.50.4

NOAA 1991–2020 climate normals from the nearest station: HOLYOKE (4.0 mi) · NOAA NCEI

Places in ZIP 80734

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