U.S. postal lookup

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.

42,735 verified records
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New Jersey ZIP Codes

Complete postal directory, details, and geographic map for the State of New Jersey.

State ZIP Code City County Area Codes
NJ 08540 Princeton Mercer County 609, 640, 732, 848, 908
NJ 08541 Princeton Mercer County 609
NJ 08542 Princeton Mercer County 609, 640
NJ 08543 Princeton Mercer County 609
NJ 08544 Princeton Mercer County 609, 640
NJ 08550 Princeton Junction Mercer County 609, 640
NJ 08551 Ringoes Hunterdon County 609, 640, 908
NJ 08553 Rocky Hill Somerset County 609, 640, 908
NJ 08554 Roebling Burlington County 215, 267, 445, 609, 640
NJ 08555 Roosevelt Monmouth County 609, 640, 732, 848
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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.