ZIP code · Surprise · Arizona · United States

ZIP code 85378 — Surprise

ZIP code 85378 serves Surprise, Arizona.

Postal code
85378
Single source Value from one source, not cross-checked.
City
Surprise
County
Maricopa FIPS 04013
State
Arizona
Country
United States
Coordinates
33.6306, -112.3332 — precision precise (locality)
View on OpenStreetMap
Population
9,401 (ZCTA, ACS 5-year)
Population density
2,612 / sq mi
Land area
3.6 sq mi (9.3 km²) (ZCTA, ACS 5-year)
Median household income
$62,881
Per-capita income
$29,752
Median age
41.6
Households
3,849
Housing units
4,671
Median home value
$235,200
Median gross rent
$1,369 / month
Congressional districts
AZ-8 (also AZ-9) (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 codes
480, 602, 623 (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 105°F), coldest Dec (avg low 40°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F656977849310210510498877464
Avg low °F414449556472807973604840
Precip in1.01.31.00.30.10.00.81.00.70.60.60.9

NOAA 1991–2020 climate normals from the nearest station: YOUNGTOWN (3.0 mi) · NOAA NCEI

Places in ZIP 85378

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