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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.

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Decatur County ZIP Codes

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

County State ZIP Code City Area Codes
Decatur County IA 50108 Grand River 641
Decatur County IA 50140 Lamoni 641, 660
Decatur County IA 50144 Leon 641
Decatur County IA 50262 Van Wert 641
Decatur County IA 50264 Weldon 641
Decatur County IN 47225 Clarksburg 812, 930
Decatur County IN 47240 Greensburg 765, 812, 930
Decatur County IN 47263 New Point 812, 930
Decatur County IN 47272 Saint Paul 765, 812, 930
Decatur County IN 47283 Westport 812, 930
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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.