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
Maps and coordinates
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 03241 Hebron Grafton County 603
NH 03242 Henniker Merrimack County 603
NH 03243 Hill Merrimack County 603
NH 03244 Hillsborough Hillsborough County 603
NH 03245 Holderness Grafton County 603
NH 03246 Laconia Belknap County 603
NH 03247 Laconia Belknap County 603
NH 03249 Gilford Belknap County 603
NH 03251 Lincoln Grafton County 603
NH 03252 Lochmere Belknap County 603
Page 8 of 29

Geographic Map of New Hampshire

Postal context

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.