Counties of New Hampshire

History and development

County boundaries and institutions in New Hampshire grew out of colonial-era administration. Five of the modern counties trace their origin to 1769, when New Hampshire was still a British colony; others were created later as settlement and governance needs evolved. Over time county functions and boundaries have been adjusted, but the ten-county structure has remained stable and continues to reflect regional communities and court circuits.

List of counties

The ten counties of New Hampshire are listed below. Brief regional notes follow each name to indicate general location within the state.

• Belknap — central Lakes Region
• Carroll — eastern, near the White Mountains
• Cheshire — southwestern, along the Vermont border
• Coös — northernmost, largest by land area
• Grafton — west-central, includes parts of the White Mountain foothills
• Hillsborough — southern, contains several of the state's largest cities
• Merrimack — central, runs through the state capital region
• Rockingham — southeastern, Atlantic coast and suburbs
• Strafford — southeastern interior
• Sullivan — west-central, along the Connecticut River

Government, duties, and distinctions

County government in New Hampshire is typically organized around elected county commissioners, a sheriff, and other officers responsible for county courts, jails, registries of deeds, and some social or health services. Unlike many parts of the United States, New England places considerable emphasis on town and municipal government; as a result, counties in New Hampshire often perform a narrower set of services than counties elsewhere.

Identifiers and practical uses

For statistical and administrative purposes each county is assigned a Federal Information Processing Standard (FIPS) code. The state code for New Hampshire is 33, and each county has a unique three-digit code appended to that state number to form a five-digit identifier. These FIPS codes are widely used in federal datasets, mapping, emergency planning, and research to uniquely identify county-level units.

Notable facts

Coös County, in the far north, is notable for its large area and low population density compared with southern counties. Southern counties, particularly those contiguous with Massachusetts and near the seacoast, concentrate a larger share of the state's residents and economic activity. While counties remain important legal and administrative units, everyday civic life in New Hampshire is deeply organized around towns and cities, a hallmark of New England governance.