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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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Monmouth County ZIP Codes

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

County State ZIP Code City Area Codes
Monmouth County NJ 07728 Freehold 732, 848
Monmouth County NJ 07730 Hazlet 732, 848
Monmouth County NJ 07731 Howell 732, 848
Monmouth County NJ 07732 Highlands 732, 848
Monmouth County NJ 07733 Holmdel 732, 848
Monmouth County NJ 07734 Keansburg 732, 848
Monmouth County NJ 07735 Keyport 732, 848
Monmouth County NJ 07737 Leonardo 732, 848
Monmouth County NJ 07738 Lincroft 732, 848
Monmouth County NJ 07739 Little Silver 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.