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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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Somerset County ZIP Codes

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

County State ZIP Code City Area Codes
Somerset County NJ 08853 Neshanic Station 908
Somerset County NJ 08869 Raritan 908
Somerset County NJ 08873 Somerset 732, 848, 908
Somerset County NJ 08875 Somerset 732
Somerset County NJ 08876 Somerville 908
Somerset County NJ 08880 South Bound Brook 732, 848
Somerset County NJ 08890 Zarephath 732, 848, 908
Somerset County PA 15411 Addison 227, 240, 301, 582, 724, 814, 878
Somerset County PA 15424 Confluence 227, 240, 301, 582, 724, 814, 878
Somerset County PA 15485 Ursina 814
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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.