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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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Union County ZIP Codes

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

County State ZIP Code City Area Codes
Union County NC 28112 Monroe 704, 803, 839, 843, 854, 980
Union County NC 28173 Waxhaw 704, 803, 839, 980
Union County NC 28174 Wingate 704, 980
Union County NJ 07016 Cranford 732, 848, 862, 908, 973
Union County NJ 07023 Fanwood 908
Union County NJ 07027 Garwood 908
Union County NJ 07033 Kenilworth 862, 908, 973
Union County NJ 07036 Linden 347, 718, 732, 848, 908, 917, 929
Union County NJ 07060 Plainfield 732, 848, 908
Union County NJ 07061 Plainfield 908
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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.