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U.S. ZIP Codes Database 2026

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Strafford County ZIP Codes

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

County State ZIP Code City Area Codes
Strafford County NH 03815 Center Strafford 603
Strafford County NH 03820 Dover 207, 603
Strafford County NH 03821 Dover 603
Strafford County NH 03822 Dover 603
Strafford County NH 03823 Madbury 603
Strafford County NH 03824 Durham 603
Strafford County NH 03825 Barrington 603
Strafford County NH 03835 Farmington 603
Strafford County NH 03839 Rochester 603
Strafford County NH 03851 Milton 207, 603
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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.