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
All states and U.S. territories
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State directory

New Hampshire ZIP Codes

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

State ZIP Code City County Area Codes
NH 03852 Milton Mills Strafford County 207, 603
NH 03853 Mirror Lake Carroll County 603
NH 03854 New Castle Rockingham County 207, 603
NH 03855 New Durham Strafford County 603
NH 03856 Newfields Rockingham County 603
NH 03857 Newmarket Rockingham County 603
NH 03858 Newton Rockingham County 351, 603, 978
NH 03859 Newton Junction Rockingham County 603
NH 03860 North Conway Carroll County 603
NH 03861 Lee Strafford County 603
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Geographic Map of New Hampshire

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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.