Town · New Hampshire
Groton, New Hampshire
Groton, town, in Grafton County, New Hampshire. Groton had 589 residents on July 1, 2025 by the Census Bureau's estimate, up 3.9% since 2020; the 2020 Census counted 569 and the ACS 2020-2024 5-year estimates put it at 507 (±121). GEOID 3300932180.
Residents, July 2025 estimate
589
Census Bureau estimate (no margin published)
2020 Census count: 569 · ACS 2020-2024: 507 ±121
Median household income
$85,625
±$21,177 (90% margin)
New Hampshire: $99,031
Median home value
$269,000
±$45,487 (90% margin)
New Hampshire: $402,500
Median gross rent
$2,667
±$295 (90% margin)
New Hampshire: $1,491
Where is Groton and what county is it in?
Groton is a town in Grafton County, New Hampshire. It covers 40.7 square miles of land, 14 residents per square mile in 2020.
Groton is in the Lebanon-Claremont, NH-VT micropolitan statistical area, which takes in 4 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 Groton, and is it growing?
The Census Bureau estimates that 589 people lived in Groton on July 1, 2025, up 3.9% since 2020, faster than New Hampshire (+2.7%). The 2020 Census counted 569 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 507 (±121).
| Measure | Groton | Grafton County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 507±121 | 92,120 | no clear change |
| Households | 231±53 | 37,107 | no clear change |
| Average household size | 2.19±0.24 | 2.29 | no clear change |
| Housing units | 391±81 | 51,920 | no clear change |
Groton's population since 2000
From 456 in 2000 to 589 in 2025: up 29.2%. The 2000, 2010 and 2020 figures are census counts, each for Groton 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 Groton?
The median resident of Groton is 51.1 years old; 15.4% are under 18 and 29.4% are 65 or older. The largest group is non-Hispanic white residents at 89.9%, then non-Hispanic residents of two or more races at 5.9%.
| Measure | Groton | Grafton County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 51.1±16.2 | 44.1 | no clear change |
| Under 18 years | 15.4%±5.5 pts | 15.6% | – |
| 65 years and over | 29.4%±7.3 pts | 23.0% | – |
| Male | 52.7%±6.1 pts | 49.6% | – |
| Hispanic or Latino (any race) | 3.9%±3.7 pts | 2.9% | – |
| White alone, not Hispanic | 89.9%±5.7 pts | 87.5% | −10.1 pts |
| Black or African American alone, not Hispanic | 0.0%±6.7 pts | 1.1% | – |
| Asian alone, not Hispanic | 0.2%±0.5 pts | 3.5% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±6.7 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±6.7 pts | 0.0% | – |
| Two or more races, not Hispanic | 5.9%±4.5 pts | 4.4% | – |
| Some other race alone, not Hispanic | 0.0%±6.7 pts | 0.5% | – |
| Born outside the United States | 2.4%±1.9 pts | 5.6% | – |
| Speak a language other than English at home (age 5+) | 2.3%±2.0 pts | 6.2% | – |
| Civilian veterans (age 18+) | 7.9%±3.3 pts | 7.2% | – |
| With a disability | 21.1%±7.0 pts | 14.0% | – |
| No health insurance coverage | 5.5%±3.7 pts | 5.4% | – |
| High school graduate or higher (age 25+) | 94.9%±3.7 pts | 94.7% | – |
| Bachelor's degree or higher (age 25+) | 29.2%±8.1 pts | 46.7% | +16.7 pts |
| Graduate or professional degree (age 25+) | 16.1%±7.0 pts | 24.5% | – |
| Lived in the same house a year earlier | 92.3%±4.7 pts | 86.8% | – |
| Moved from another state in the past year | 3.2%±3.7 pts | 6.4% | – |
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 Groton earn?
Half of Groton's 231 households earn less than $85,625 a year (±$21,177), against $88,261 in Grafton County and $99,031 in New Hampshire. In 2015-2019 it was $68,713 in 2024 dollars; the margins of error cannot tell the two periods apart. 10.5% of residents live below the poverty line.
| Measure | Groton | Grafton County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $85,625±$21,177 | $88,261 | no clear change |
| Mean household income | $85,010±$8,684 | $125,563 | – |
| Per capita income | $36,590±$4,948 | $52,790 | no clear change |
| People below the poverty line | 10.5%±6.4 pts | 10.4% | – |
| Children under 18 below the poverty line | 17.9%±21.9 pts | 10.8% | – |
| Households receiving SNAP | 5.2%±3.1 pts | 6.4% | – |
| Households with a computer | 96.5%±2.9 pts | 95.2% | – |
| Households with a broadband subscription | 92.6%±5.9 pts | 90.3% | – |
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 Groton?
Owners occupy 91.3% of Groton's occupied homes and renters 8.7%. The median owner-occupied home is valued at $269,000 by its owner (±$45,487). The median renter pays $2,667 a month including utilities.
| Measure | Groton | Grafton County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $269,000±$45,487 | $344,500 | +$88,703 |
| Median gross rent | $2,667±$295 | $1,301 | +$1,537 |
| Renters paying 35% or more of income on rent | 50.0%±43.5 pts | 36.9% | – |
| Median monthly owner costs, with a mortgage | $1,603±$171 | $2,070 | – |
| Owner-occupied homes | 91.3%±7.3 pts | 71.3% | no clear change |
| Renter-occupied homes | 8.7%±7.3 pts | 28.7% | – |
| Housing units | 391±81 | 51,920 | no clear change |
| Homeowner vacancy rate | 0.0%±15.2 pts | 0.7% | – |
| Rental vacancy rate | 0.0%±68.8 pts | 4.8% | – |
| Single-family detached homes | 83.9%±7.8 pts | 61.4% | – |
| Mobile homes | 13.6%±6.1 pts | 7.2% | – |
| Built 2020 or later | 8.7%±12.5 pts | 1.5% | – |
| Built 2010 to 2019 | 4.3%±3.3 pts | 5.9% | – |
| Built 1939 or earlier | 7.4%±4.8 pts | 20.2% | – |
| Households with no vehicle | 3.0%±5.1 pts | 6.3% | – |
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 Groton building?
Builders took permits for 12 new housing units in Groton in 2025 (12 in single-family houses), 20.4 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 Groton work and get to work?
81.9% of Groton's workers drive alone and 13.7% work from home. The average trip to work takes 29.4 minutes.
| Measure | Groton | Grafton County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 58.4%±7.5 pts | 60.5% | – |
| Unemployment rate | 1.9%±2.0 pts | 3.2% | – |
| Drove alone to work | 81.9%±8.9 pts | 67.1% | – |
| Carpooled | 2.4%±2.8 pts | 8.6% | – |
| Public transportation | 0.0%±13.1 pts | 0.5% | – |
| Walked | 2.0%±3.2 pts | 4.4% | – |
| Worked from home | 13.7%±7.8 pts | 17.2% | – |
| Mean travel time to work | 29.4 min±4.4 | 22.2 min | −15.7 min |
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 Groton?
No census tract lies mostly in Groton; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9609Grafton County | 3,510 | $108,250 |
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 Groton) · Census block assignment files
How does Groton compare with other places in New Hampshire?
By the Census Bureau's July 2025 estimates, Groton is the 9,542nd-most populous of the 16,079 U.S. towns and townships that have one and the 201st-most populous of 221 in New Hampshire.
Groton is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 201st | 221 |
Groton's figures with every place in New Hampshire (CSV)
Every place in New Hampshire, sortable · Compare Groton 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 Groton?
23 of the 57 figures for Groton 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 Groton 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' school search.