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 73438 Healdton Carter County 580
OK 73439 Kingston Marshall County 430, 580, 903
OK 73440 Lebanon Marshall County 430, 580, 903
OK 73441 Leon Love County 580
OK 73442 Loco Stephens County 580
OK 73443 Lone Grove Carter County 580
OK 73444 Hennepin Carter County 405, 572, 580
OK 73446 Madill Marshall County 580
OK 73447 Mannsville Johnston County 580
OK 73448 Marietta Love County 430, 580, 903, 940
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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.