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Hillsborough County, New Hampshire

Hillsborough County: The most populous county in the U.

About

Hillsborough County is a county located in the U.S. state of New Hampshire. As of the 2010 census, the population was 400,721 and a population density of 173 people per km². After 10 years in 2020 county had an estimated population of 418,735 inhabitants. Its county seat is Manchester. The county was created 257 years ago in 1768.

Hillsborough County locator map
Location of Hillsborough County on New Hampshire map.

County Snapshot

Hillsborough County at a glance

Hillsborough County currently has 31 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

31

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Top linked places

Manchester 112,546 Nashua 89,167 Merrimack 27,452 Hudson 25,620

Quick Facts about Hillsborough County

Population 418,735 (2020)
Country United States of America
State New Hampshire (United States)
Different from Hillsborough County
Area 2311 km2
Water as percent of area 1.8%
Land as percent of area 98.2%
Latitude & Longitude 42.9153,-71.7160
Named for Wills Hill, 1st Marquess of Downshire
Capital Manchester
Establishment January 01, 1769
Time Zone America/New_York
Local time 21:34:57 (15th April 2026)
Density 181 Pop. per km² as of 2020
Population growth 4.3% (2010-2020)
Weather 75℉ Chance Rain Showers 7-days weather
Courthouse Nashua 5 image
Courthouse Nashua 5 image

Geography

Hillsborough County is located at 42°54'55"N 71°42'58"W (42.9153100, -71.7160100). It has 7 neighbors: Essex County, Middlesex County, Worcester County, Cheshire County, Merrimack County, Rockingham County and Sullivan County.

Hillsborough County map

Click "full screen" full screen map icon to open full mode. View satellite images

The largest city of Hillsborough County is Manchester with a population of 112,546. Other cities include, Nashua population 89,167, Merrimack population 27,452, Hudson population 25,620 and Bedford population 22,957. See all Hillsborough County cities & populated places.

Hillsborough County Populated Places (more)

Cities, towns, neighborhoods & other populated places in Hillsborough County.

City Name Population Title
Manchester 112,546 The most populous city in Hillsborough County, New Hampshire.
Nashua 89,167 The most populous city in Hillsborough County, New Hampshire.
Merrimack 27,452 River in New Hampshire and Massachusetts, United States
Hudson 25,620 Town in New Hampshire
Bedford 22,957 City in New Hampshire, USA
Goffstown 18,136 Town in New Hampshire, United States
Milford 16,515 Town in Hillsborough County, New Hampshire, United States
Pelham 14,306 City in Hillsborough County, New Hampshire, United States of America
Amherst 11,418 Town in Hillsborough County, New Hampshire, United States
Weare 9,100 Town in New Hampshire, United States
Litchfield 8,658 Town in Connecticut, United States
Hollis 8,123 Town in Oklahoma
Peterborough 6,743 Town in Hillsborough County, New Hampshire, United States of America
New Boston 5,941 City in Texas, United States
Brookline 5,495 Town in Hillsborough County, New Hampshire, United States
New Ipswich 5,429 Town in New Hampshire

Weather

75°F
Chance Rain Showers
5 to 10 mph W Wednesday

A chance of rain showers. Mostly cloudy, with a high near 75. Chance of precipitation is 30%.

7-Day Forecast

Official website of Hillsborough County

Official Website
  • Hillsborough
  • Windsor
  • Antrim
  • Francestown
  • Peterborough
  • Weare
  • Merrimack
  • Manchester
  • Sharon
  • Litchfield
  • Greenville
  • Mason
  • Goffstown
  • Brookline
  • Mont Vernon
  • New Boston
  • Nashua
  • New Ipswich
  • Hollis
  • Pelham
  • Greenfield
  • Hancock
  • Bedford
  • Lyndeborough
  • Milford
  • Amherst
  • Temple
  • Deering
  • Hudson
  • Wilton
  • Bennington

Demographics

The population of Hillsborough County increased by 4.3% in 10 years.

Year Population % Change Method
2010 400,721 - census
2011 402,774 0.51% estimation process
2012 404,344 0.39% estimation process
2013 405,281 0.23% estimation process
2014 407,275 0.49% estimation process
2015 408,985 0.42% estimation process
2016 411,333 0.57% estimation process
2017 413,204 0.45% estimation process
2018 414,630 0.34% estimation process
2019 417,025 0.57% estimation process
2020 418,735 0.41% estimation process
Comte de Hillsborough, Comté de Hillsborough, Hillsboro County, Hillsborough

People born in Hillsborough County (3)

People born in Hillsborough County, including baseball executive, born 1969 Neal Huntington, Mormon leader James Foster, racecar driver Dave Dion, .

More notable people

Other places with the same name (1)

New Hampshire Other Counties (more counties)

County Name Population Title
Rockingham County 311,307 County in New Hampshire, United States
Merrimack County 152,622 County in New Hampshire, United States
Strafford County 131,533 County in New Hampshire, United States
Manchester 112,546 The most populous city in Hillsborough County, New Hampshire.
City of Manchester 109,565 The most populous city in Hillsborough County, New Hampshire.
Grafton County 90,691 County in New Hampshire, United States
Nashua 89,167 The most populous city in Hillsborough County, New Hampshire.
Cheshire County 76,228 County in New Hampshire, United States
Belknap County 61,551 County in New Hampshire, United States
Carroll County 49,167 County in New Hampshire, United States
Concord 43,924 The capital of New Hampshire.
Sullivan County 43,267 County in New Hampshire, United States
East Concord 42,605 A census-designated place in Merrimack County, New Hampshire.
Derry Village 34,539 City in Rockingham County, New Hampshire, United States of America
Derry 33,442 Town in New Hampshire, United States
Dover 32,443 County seat city in Strafford County, New Hampshire, United States

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