List of counties in New Hampshire

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A map of the US state of New Hampshire with county borders.

This is a list of counties in New Hampshire. There are ten counties in the U.S. state of New Hampshire. Five of the counties were created in 1769, when New Hampshire was still an English colony and not a state, during the first subdivision of the state into counties. The last counties created were Belknap County and Carroll County, in 1840. The majority of New Hampshire's counties were named for prominent British or American people or geographic locations and features. Only one county's name originates in a Native American language; Coos County, named for an Algonquian word meaning small pines. The counties tend to be smaller in land area towards the southern end of the state, where New Hampshire population is concentrated, and larger in land area in the less populous north.[1][2]

The FIPS county code is the five-digit Federal Information Processing Standard (FIPS) code which uniquely identifies counties and county equivalents in the United States. The three-digit number is unique to each individual county within a state, but to be unique within the entire United States, it must be prefixed by the state code. This means that, for example, while Belknap County, New Hampshire is 001, Addison County, Vermont and Alachua County, Florida are also 001. To uniquely identify Belknap County, New Hampshire, one must use the state code of 33 plus the county code of 001; therefore, the unique nationwide identifier for Belknap County, New Hampshire is 33001. The links in the column FIPS County Code are to the Census Bureau Info page for that county.[3]


CountyFIPS Code
County Seat
Formed from
Belknap County001Laconia1840Parts of Merrimack County and Strafford County.Jeremy Belknap (1744-1798), early New Hampshire historian.60,088401 sq mi
(1,039 km2)
State map highlighting Belknap County
Carroll County003Ossipee1840Part of Strafford County.Charles Carroll of Carrollton (1737 - 1832), the last surviving signer of the United States Declaration of Independence.47,818934 sq mi
(2,419 km2)
State map highlighting Carroll County
Cheshire County005Keene1769One of five original counties.English county of Cheshire.77,117708 sq mi
(1,834 km2)
State map highlighting Cheshire County
Coos County007Lancaster1803Part of Grafton County.An Algonquian word meaning small pines.33,0551,801 sq mi
(4,665 km2)
State map highlighting Coos County
Grafton County009North Haverhill1769One of five original counties.Augustus Henry Fitzroy, 3rd Duke of Grafton (1735-1811), a Prime Minister of Great Britain (1768-1770).89,1181,714 sq mi
(4,439 km2)
State map highlighting Grafton County
Hillsborough County011Manchester
1769One of five original counties.Wills Hill, 1st Marquess of Downshire (1718-1793), known in America as the Earl of Hillsborough, who served as the first Secretary of State for the Colonies.400,721876 sq mi
(2,269 km2)
State map highlighting Hillsborough County
Merrimack County013Concord1823Parts of Hillsborough County and Rockingham County.The Merrimack River.146,445934 sq mi
(2,419 km2)
State map highlighting Merrimack County
Rockingham County015Brentwood1769One of five original counties.Charles Watson-Wentworth, 2nd Marquess of Rockingham (1730-1782), a two-time Prime Minister of Great Britain (1765-1766, 1782).295,223695 sq mi
(1,800 km2)
State map highlighting Rockingham County
Strafford County017Dover1769One of five original counties.William Wentworth, 2nd Earl of Strafford (1626-1695), an English noble who owned colonial lands.123,143369 sq mi
(956 km2)
State map highlighting Strafford County
Sullivan County019Newport1827Part of Cheshire County.John Sullivan (1740-1795), the third and fifth governor of New Hampshire (1786-1788, 1789-1790).43,742537 sq mi
(1,391 km2)
State map highlighting Sullivan County


  1. ^ Stackpole, Everett Schermerhorn (1916). History of New Hampshire. The American Historical Society. 
  2. ^ a b "New Hampshire Counties". New Hampshire Almanac. Retrieved 2007-07-24. 
  3. ^ a b "EPA County FIPS Code Listing". US Environmental Protection Agency. Retrieved 2007-07-24. 
  4. ^ a b c "NACo - Find a county". National Association of Counties. Archived from the original on 2007-07-11. Retrieved 2007-07-24. 
  5. ^ "New Hampshire Counties". The NHGenWeb Project. Archived from the original on 2007-07-13. Retrieved 2007-07-24. 
  6. ^ a b "New Hampshire QuickFacts". U.S. Census Bureau. Retrieved 2007-07-24.  (2000 Census)