ZIP code · Surprise · Arizona · United States
ZIP code 85378 — Surprise
ZIP code 85378 serves Surprise, Arizona.
- Postal code
- 85378Single 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)
Tools: compare 85378 with another ZIP · ZIPs within 25 miles · distance from 85378
Map of ZIP code 85378
Climate — monthly normals
Warmest month Jul (avg high 105°F), coldest Dec (avg low 40°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 65 | 69 | 77 | 84 | 93 | 102 | 105 | 104 | 98 | 87 | 74 | 64 |
| Avg low °F | 41 | 44 | 49 | 55 | 64 | 72 | 80 | 79 | 73 | 60 | 48 | 40 |
| Precip in | 1.0 | 1.3 | 1.0 | 0.3 | 0.1 | 0.0 | 0.8 | 1.0 | 0.7 | 0.6 | 0.6 | 0.9 |
NOAA 1991–2020 climate normals from the nearest station: YOUNGTOWN (3.0 mi) · NOAA NCEI
Places in ZIP 85378
- 1 schools
- 1 colleges & universities
- 3 hospitals & clinics
- 8 restaurants & cafés
- 14 parks
- 3 playgrounds
- 1 gyms & sports centres
- 1 libraries
- 1 post offices
- 6 places of worship
- 1 banks
- 4 gas stations
- 2 EV charging stations
- 3 police & fire stations
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