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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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Adams County ZIP Codes

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

County State ZIP Code City Area Codes
Adams County PA 17316 East Berlin 223, 717
Adams County PA 17320 Fairfield 223, 227, 240, 301, 717
Adams County PA 17325 Gettysburg 223, 227, 240, 301, 410, 443, 667, 717
Adams County PA 17326 Gettysburg 717
Adams County PA 17337 Idaville 717
Adams County PA 17340 Littlestown 223, 410, 443, 667, 717
Adams County PA 17343 Mc Knightstown 223, 717
Adams County PA 17344 Mc Sherrystown 223, 717
Adams County PA 17350 New Oxford 223, 717
Adams County PA 17353 Orrtanna 223, 717
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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.