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
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Oklahoma ZIP Codes

Complete postal directory, details, and geographic map for the State of Oklahoma.

State ZIP Code City County Area Codes
OK 74365 Salina Mayes County 539, 918
OK 74366 Spavinaw Mayes County 539, 918
OK 74367 Strang Mayes County 539, 918
OK 74368 Twin Oaks Delaware County 539, 918
OK 74369 Welch Craig County 539, 620, 918
OK 74370 Wyandotte Ottawa County 417, 539, 918
OK 74401 Muskogee Muskogee County 539, 918
OK 74402 Muskogee Muskogee County 918
OK 74403 Muskogee Muskogee County 539, 918
OK 74421 Beggs Okmulgee County 539, 918
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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.