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Hillsborough County, New Hampshire facts for kids

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Hillsborough County
U.S. county
Manchester skyline
Manchester skyline
Official seal of Hillsborough County
Seal
Map of New Hampshire highlighting Hillsborough County
Location within the U.S. state of New Hampshire
Map of the United States highlighting New Hampshire
New Hampshire's location within the U.S.
Country  United States
State  New Hampshire
Founded 1769
Named for The Earl of Hillsborough
Seat Manchester and Nashua
Largest city Manchester (by population)
Weare (by area)
Area
 • Total 892.5 sq mi (2,312 km2)
 • Land 876.5 sq mi (2,270 km2)
 • Water 15.9 sq mi (41 km2)  1.8%
Population
 (2020)
 • Total 422,937
 • Density 473.879/sq mi (182.966/km2)
Time zone UTC−5 (Eastern)
 • Summer (DST) UTC−4 (EDT)
Congressional districts 1st, 2nd

Hillsborough County is the most populous county in the U.S. state of New Hampshire. As of the 2020 census, the population was 422,937, almost one-third the population of the entire state. Its county seats are Manchester and Nashua, the state's two biggest cities. Hillsborough is northern New England's most populous county as well as its most densely populated.

Hillsborough County comprises the Manchester-Nashua, NH Metropolitan Statistical Area, which in turn constitutes a portion of the Boston-Worcester-Providence, MA-RI-NH-CT Combined Statistical Area.

History

Hillsborough was one of the five original counties identified for New Hampshire in 1769, and was named for Wills Hill, the Earl of Hillsborough who was British Secretary of State for the Colonies at the time. The county was organized at Amherst on March 19, 1771. In 1823 a number of towns were removed to become part of Merrimack County. Over several years ending in 1869, county administrative functions were moved from Amherst first to Milford in 1866 then to the current seats of Manchester and Nashua.

Geography

According to the U.S. Census Bureau, the county has a total area of 892 square miles (2,310 km2), of which 876 square miles (2,270 km2) is land and 16 square miles (41 km2) (1.8%) is water. The highest point in Hillsborough county is Pack Monadnock Mountain at 2,290 feet (700 m).

Adjacent counties

National protected area

  • Wapack National Wildlife Refuge

Demographics

Historical population
Census Pop. %±
1790 32,883 —
1800 43,899 33.5%
1810 49,249 12.2%
1820 53,884 9.4%
1830 37,724 −30.0%
1840 42,494 12.6%
1850 57,478 35.3%
1860 62,140 8.1%
1870 64,238 3.4%
1880 75,634 17.7%
1890 93,247 23.3%
1900 112,640 20.8%
1910 126,072 11.9%
1920 135,512 7.5%
1930 140,165 3.4%
1940 144,888 3.4%
1950 156,987 8.4%
1960 178,161 13.5%
1970 223,941 25.7%
1980 276,608 23.5%
1990 336,073 21.5%
2000 380,841 13.3%
2010 400,721 5.2%
2020 422,937 5.5%
U.S. Decennial Census
1790–1960 1900–1990
1990–2000 2010–2018
2020 American Community Survey Population Estimates, Race and Hispanic Origin
Race Percentage
White, not Hispanic or Latino 83%
Asian 6%
Hispanic or Latino 8%
Black or African American 3%

As of the 2020 United States census, there were 422,937 people residing in the county. The population density was 482.8 inhabitants per square mile (186.4/km2).

The racial makeup of the county was 81.0% white, 4.8% Asian, 3.9% black or African American, 1.7% American Indian, 2.1% from other races, and 2.0% from two or more races. Those of Hispanic or Latino origin made up 8% of the population.

For the period 2011–2015, 24.8% of the county's population had French ancestry (including 9.9% of the total population with French Canadian ancestry), 20.9% had Irish, 13.1% had English, 10.2% had Italian, and 8.2% had German ancestry. For the same time period, the estimated median annual income for a household in the county was $71,244, and the median income for a family was $85,966. Male full-time workers had a median income of $60,349 versus $44,270 for females. The per capita income for the county was $35,242. About 5.8% of families and 8.8% of the population were below the poverty line, including 11.7% of those under age 18 and 5.9% of those age 65 or over.

Communities

Cities

Towns

Census-designated places

Villages

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