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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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Middlesex County ZIP Codes

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

County State ZIP Code City Area Codes
Middlesex County NJ 08882 South River 732, 848
Middlesex County NJ 08884 Spotswood 732, 848
Middlesex County NJ 08899 Edison 732, 848, 908
Middlesex County NJ 08901 New Brunswick 732, 848
Middlesex County NJ 08902 North Brunswick 732, 848
Middlesex County NJ 08903 New Brunswick 732
Middlesex County NJ 08904 Highland Park 732, 848
Middlesex County NJ 08905 New Brunswick 732
Middlesex County NJ 08906 New Brunswick 732
Middlesex County NJ 08922 New Brunswick 732
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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.