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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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Onslow County ZIP Codes

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

County State ZIP Code City Area Codes
Onslow County NC 28546 Jacksonville 472, 910
Onslow County NC 28547 Camp Lejeune 252, 472, 910
Onslow County NC 28555 Maysville 252, 472, 910
Onslow County NC 28574 Richlands 252, 472, 910
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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.