U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
All states and U.S. territories
Maps and coordinates
County directory

Pinal County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Pinal County.

County State ZIP Code City Area Codes
Pinal County AZ 85173 Superior 520, 928
Pinal County AZ 85178 Apache Junction 480
Pinal County AZ 85191 Valley Farms 520
Pinal County AZ 85192 Winkelman 520, 928
Pinal County AZ 85193 Casa Grande 520
Pinal County AZ 85194 Casa Grande 520
Pinal County AZ 85217 Apache Junction 480
Pinal County AZ 85218 Apache Junction 480
Pinal County AZ 85219 Apache Junction 480
Pinal County AZ 85220 Apache Junction 480
Page 3 of 6

Geographic Map of Pinal County

Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.