City · New Hampshire
Somersworth, New Hampshire
Somersworth, city, in Strafford County, New Hampshire. Somersworth had 12,171 residents on July 1, 2025 by the Census Bureau's estimate, up 2.6% since 2020; the 2020 Census counted 11,855 and the ACS 2020-2024 5-year estimates put it at 12,111 (±21). GEOID 3369940.
Residents, July 2025 estimate
12,171
Census Bureau estimate (no margin published)
2020 Census count: 11,855 · ACS 2020-2024: 12,111 ±21
Median household income
$74,504
±$12,735 (90% margin)
New Hampshire: $99,031
Median home value
$318,400
±$23,397 (90% margin)
New Hampshire: $402,500
Median gross rent
$1,477
±$134 (90% margin)
New Hampshire: $1,491
Where is Somersworth and what county is it in?
Somersworth is a city in Strafford County, New Hampshire. It covers 9.8 square miles of land, 1,209 residents per square mile in 2020.
Somersworth is in the Boston-Cambridge-Newton, MA-NH metropolitan statistical area, which takes in 7 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Somersworth, and is it growing?
The Census Bureau estimates that 12,171 people lived in Somersworth on July 1, 2025, up 2.6% since 2020, in line with New Hampshire (+2.7%). The 2020 Census counted 11,855 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 12,111 (±21).
| Measure | Somersworth | Strafford County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 12,111 ±21 | 132,575 | +186 |
| Households | 5,201 ±354 | 52,080 | no clear change |
| Average household size | 2.33 ±0.16 | 2.39 | no clear change |
| Housing units | 5,646 ±361 | 56,609 | no clear change |
Somersworth's population since 2000
From 11,477 in 2000 to 12,171 in 2025: up 6.0%. The 2000, 2010 and 2020 figures are census counts, each for Somersworth as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Somersworth?
The median resident of Somersworth is 38.4 years old; 19.9% are under 18 and 14.0% are 65 or older. The largest group is non-Hispanic white residents at 83.2%, then Hispanic or Latino residents (of any race) at 6.0%. 6.6% of residents were born outside the United States.
| Measure | Somersworth | Strafford County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 38.4 ±2.7 | 38.2 | no clear change |
| Under 18 years | 19.9% ±3.0 pts | 17.6% | – |
| 65 years and over | 14.0% ±3.1 pts | 17.1% | – |
| Male | 46.8% ±3.8 pts | 49.4% | – |
| Hispanic or Latino (any race) | 6.0% ±2.9 pts | 3.2% | +3.6 pts |
| White alone, not Hispanic | 83.2% ±3.8 pts | 87.6% | no clear change |
| Black or African American alone, not Hispanic | 2.2% ±2.2 pts | 1.1% | – |
| Asian alone, not Hispanic | 2.6% ±1.4 pts | 2.7% | −4.0 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.3 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.3 pts | 0.0% | – |
| Two or more races, not Hispanic | 5.8% ±2.7 pts | 4.8% | – |
| Some other race alone, not Hispanic | 0.3% ±0.6 pts | 0.5% | – |
| Born outside the United States | 6.6% ±2.6 pts | 4.4% | no clear change |
| Speak a language other than English at home (age 5+) | 5.7% ±1.9 pts | 5.3% | – |
| Civilian veterans (age 18+) | 9.5% ±3.4 pts | 7.3% | – |
| With a disability | 15.7% ±3.4 pts | 13.7% | – |
| No health insurance coverage | 4.4% ±2.4 pts | 5.2% | no clear change |
| High school graduate or higher (age 25+) | 93.6% ±2.2 pts | 94.7% | – |
| Bachelor's degree or higher (age 25+) | 31.4% ±6.3 pts | 39.3% | no clear change |
| Graduate or professional degree (age 25+) | 10.0% ±2.9 pts | 14.2% | – |
| Lived in the same house a year earlier | 80.9% ±5.2 pts | 84.6% | – |
| Moved from another state in the past year | 5.0% ±3.8 pts | 4.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Somersworth earn?
Half of Somersworth's 5,201 households earn less than $74,504 a year (±$12,735), against $88,570 in Strafford County and $99,031 in New Hampshire. In 2015-2019 it was $82,042 in 2024 dollars; the margins of error cannot tell the two periods apart. 11.2% of residents live below the poverty line.
| Measure | Somersworth | Strafford County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $74,504 ±$12,735 | $88,570 | no clear change |
| Mean household income | $94,445 ±$8,674 | $114,189 | – |
| Per capita income | $42,320 ±$3,886 | $46,304 | no clear change |
| People below the poverty line | 11.2% ±3.9 pts | 8.7% | no clear change |
| Children under 18 below the poverty line | 18.8% ±12.2 pts | 7.2% | – |
| Households receiving SNAP | 12.0% ±4.9 pts | 7.3% | – |
| Households with a computer | 97.4% ±1.6 pts | 96.6% | – |
| Households with a broadband subscription | 92.6% ±4.7 pts | 93.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Somersworth?
Owners occupy 57.8% of Somersworth's occupied homes and renters 42.2%. The median owner-occupied home is valued at $318,400 by its owner (±$23,397). The median renter pays $1,477 a month including utilities, and 49.1% of renters pay 35% or more of their income on rent.
| Measure | Somersworth | Strafford County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $318,400 ±$23,397 | $362,800 | +$91,091 |
| Median gross rent | $1,477 ±$134 | $1,488 | +$159 |
| Renters paying 35% or more of income on rent | 49.1% ±12.2 pts | 41.3% | +20.7 pts |
| Median monthly owner costs, with a mortgage | $2,353 ±$212 | $2,330 | – |
| Owner-occupied homes | 57.8% ±5.2 pts | 67.1% | no clear change |
| Renter-occupied homes | 42.2% ±5.2 pts | 32.9% | – |
| Housing units | 5,646 ±361 | 56,609 | no clear change |
| Homeowner vacancy rate | 0.0% ±1.2 pts | 0.0% | – |
| Rental vacancy rate | 8.2% ±6.0 pts | 5.1% | – |
| Single-family detached homes | 44.2% ±5.1 pts | 55.0% | – |
| Mobile homes | 6.6% ±2.3 pts | 8.2% | – |
| Built 2020 or later | 1.8% ±1.2 pts | 1.7% | – |
| Built 2010 to 2019 | 5.5% ±2.7 pts | 8.6% | – |
| Built 1939 or earlier | 23.2% ±4.7 pts | 18.8% | – |
| Households with no vehicle | 6.5% ±4.4 pts | 4.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Somersworth building?
Builders took permits for 33 new housing units in Somersworth in 2025 (33 in single-family houses), 2.7 per 1,000 residents against 3.6 across New Hampshire.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Somersworth work and get to work?
79.1% of Somersworth's workers drive alone and 11.7% work from home. The average trip to work takes 25.8 minutes. The unemployment rate in 2020-2024 averaged 2.8%.
| Measure | Somersworth | Strafford County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 71.2% ±4.0 pts | 67.9% | – |
| Unemployment rate | 2.8% ±1.6 pts | 3.5% | no clear change |
| Drove alone to work | 79.1% ±4.9 pts | 71.6% | – |
| Carpooled | 6.3% ±4.5 pts | 6.0% | – |
| Public transportation | 2.3% ±2.0 pts | 1.4% | – |
| Walked | 0.3% ±0.4 pts | 3.5% | – |
| Worked from home | 11.7% ±3.4 pts | 16.2% | – |
| Mean travel time to work | 25.8 min ±2.6 | 26.0 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Somersworth?
2 census tracts lie mostly in Somersworth (2020 census blocks). Their median household incomes run from $70,759 (Tract 830.01) to $82,753 (Tract 830.02).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 830.01Strafford County | 6,442 | $70,759 |
| Tract 830.02Strafford County | 5,669 | $82,753 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Somersworth) · Census block assignment files
How does Somersworth compare with other places in New Hampshire?
By the Census Bureau's July 2025 estimates, Somersworth is the 2,803rd-most populous of the 19,476 U.S. incorporated places that have one and the 11th-most populous of 13 in New Hampshire.
Somersworth ranks 181st of 235 places in New Hampshire with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 11th | 13 |
| Growth 2020-2025 (PEP) | 89th | 187 |
| Residents per square mile | 21st | 241 |
| Median household income | 181st | 235 |
| Per capita income | 169th | 240 |
| Median home value | 154th | 239 |
| Median gross rent | 78th | 221 |
| Poverty rate | 42nd | 160 |
| Bachelor's degree or higher | 161st | 239 |
| Median age | 211th | 239 |
| Owner-occupied share | 210th | 241 |
| Work from home | 157th | 214 |
| Travel time to work | 145th | 241 |
Somersworth's figures with every place in New Hampshire (CSV)
Every place in New Hampshire, sortable · Compare Somersworth with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Somersworth?
12 of the 57 figures for Somersworth on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Somersworth are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Somersworth.