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U.S. ZIP Codes Database 2026

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Assumption Parish ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Assumption Parish.

County State ZIP Code City Area Codes
Assumption Parish LA 70339 Pierre Part 225, 985
Assumption Parish LA 70341 Belle Rose 225, 985
Assumption Parish LA 70372 Labadieville 985
Assumption Parish LA 70390 Napoleonville 225, 985
Assumption Parish LA 70391 Paincourtville 225, 985
Assumption Parish LA 70393 Plattenville 225, 985

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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.