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
Maps and coordinates
County directory

Roosevelt County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Roosevelt County.

County State ZIP Code City Area Codes
Roosevelt County MT 59201 Wolf Point 406
Roosevelt County MT 59212 Bainville 306, 406, 474, 701
Roosevelt County MT 59213 Brockton 406
Roosevelt County MT 59218 Culbertson 406
Roosevelt County MT 59226 Froid 406
Roosevelt County MT 59255 Poplar 406
Roosevelt County NM 88113 Causey 575, 806
Roosevelt County NM 88115 Dora 575
Roosevelt County NM 88116 Elida 575
Roosevelt County NM 88118 Floyd 575
Page 1 of 2

Geographic Map of Roosevelt County

Postal context

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.