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

New Madrid County ZIP Codes

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

County State ZIP Code City Area Codes
New Madrid County MO 63873 Portageville 270, 364, 573, 731
New Madrid County MO 63874 Risco 573
New Madrid County MO 63878 Tallapoosa 573
Page 2 of 2

Geographic Map of New Madrid 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.