ZIP code · Ajo · Arizona · United States

ZIP code 85321 — Ajo

ZIP code 85321 serves Ajo, Arizona.

Postal code
85321
Single source Value from one source, not cross-checked.
City
Ajo
County
Pima FIPS 04019
State
Arizona
Country
United States
Coordinates
32.2295, -112.6542 — precision precise (locality)
View on OpenStreetMap
Population
4,313 (ZCTA, ACS 5-year)
Population density
3 / sq mi
Land area
1,343.8 sq mi (3,480.4 km²) (ZCTA, ACS 5-year)
Median household income
$52,127
Per-capita income
$28,384
Median age
45.4
Households
1,810
Housing units
2,326
Median home value
$120,800
Median gross rent
$920 / month
Congressional district
AZ-7 (119th Congress)
USDA hardiness zone
9b (25 to 30 °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
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 104°F), coldest Dec (avg low 43°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F687177849210110410399897767
Avg low °F454852576674807974645143
Precip in0.70.80.80.20.10.10.61.40.80.40.50.6

NOAA 1991–2020 climate normals from the nearest station: AJO (15.4 mi) · NOAA NCEI

Places in ZIP 85321

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