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 74540 Daisy Atoka County 539, 580, 918
OK 74542 Atoka Atoka County 580
OK 74543 Finley Pushmataha County 539, 580, 918
OK 74545 Gowen Latimer County 918
OK 74546 Haileyville Pittsburg County 539, 918
OK 74547 Hartshorne Pittsburg County 539, 918
OK 74549 Honobia Le Flore County 539, 918
OK 74552 Kinta Haskell County 539, 918
OK 74553 Kiowa Pittsburg County 539, 580, 918
OK 74554 Krebs Pittsburg 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.