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
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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 73541 Fletcher Comanche County 405, 572, 580
OK 73542 Frederick Tillman County 580
OK 73543 Geronimo Comanche County 580
OK 73544 Gould Harmon County 580
OK 73546 Grandfield Tillman County 580, 940
OK 73547 Granite Greer County 580
OK 73548 Hastings Stephens County 580, 940
OK 73549 Headrick Jackson County 580
OK 73550 Hollis Harmon County 580, 806, 940
OK 73551 Hollister Tillman County 580
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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.