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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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Caldwell Parish ZIP Codes

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

County State ZIP Code City Area Codes
Caldwell Parish LA 71415 Clarks 318
Caldwell Parish LA 71418 Columbia 318
Caldwell Parish LA 71435 Grayson 318
Caldwell Parish LA 71441 Kelly 318

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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.