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

Brown County ZIP Codes

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

County State ZIP Code City Area Codes
Brown County KS 66434 Hiawatha 785
Brown County KS 66439 Horton 785
Brown County KS 66515 Morrill 785
Brown County KS 66527 Powhattan 785
Brown County KS 66532 Robinson 785
Brown County MN 56019 Comfrey 507
Brown County MN 56030 Essig 507
Brown County MN 56041 Hanska 507
Brown County MN 56073 New Ulm 507
Brown County MN 56084 Searles 507
Page 2 of 8

Geographic Map of Brown 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.