ZIP code · Coolidge · Arizona · United States

ZIP code 85128 — Coolidge

ZIP code 85128 serves Coolidge, Arizona.

Postal code
85128
Single source Value from one source, not cross-checked.
City
Coolidge
County
Pinal FIPS 04021
State
Arizona
Country
United States
Coordinates
32.9574, -111.5344 — precision precise (locality)
View on OpenStreetMap
Population
18,582 (ZCTA, ACS 5-year)
Population density
112 / sq mi
Land area
166.7 sq mi (431.6 km²) (ZCTA, ACS 5-year)
Median household income
$57,205
Per-capita income
$28,099
Median age
34.4
Households
5,938
Housing units
6,527
Median home value
$208,400
Median gross rent
$1,132 / month
Congressional districts
AZ-2 (also AZ-6) (119th Congress)
USDA hardiness zone
9a (20 to 25 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Phoenix (UTC−7, no DST)
Area code
520 (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 107°F), coldest Dec (avg low 36°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F6871788695105107105101917867
Avg low °F374045515968777770564436
Precip in1.01.00.90.30.20.11.11.20.70.50.50.8

NOAA 1991–2020 climate normals from the nearest station: CASA GRANDE NM (2.6 mi) · NOAA NCEI

Places in ZIP 85128

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