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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State directory

Oklahoma ZIP Codes

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

State ZIP Code City County Area Codes
OK 74339 Commerce Ottawa County 539, 918
OK 74340 Disney Mayes County 539, 918
OK 74342 Eucha Delaware County 539, 918
OK 74343 Fairland Ottawa County 539, 918
OK 74344 Grove Delaware County 417, 539, 918
OK 74345 Grove Delaware County 918
OK 74346 Jay Delaware County 417, 479, 539, 918
OK 74347 Kansas Delaware County 539, 918
OK 74349 Ketchum Craig County 539, 918
OK 74350 Langley Mayes 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.