Town · New Hampshire
Londonderry, New Hampshire
Londonderry, town, in Rockingham County, New Hampshire. Londonderry had 27,844 residents on July 1, 2025 by the Census Bureau's estimate, up 6.9% since 2020; the 2020 Census counted 25,826 and the ACS 2020-2024 5-year estimates put it at 26,685 (±23). GEOID 3301543220.
Residents, July 2025 estimate
27,844
Census Bureau estimate (no margin published)
2020 Census count: 25,826 · ACS 2020-2024: 26,685 ±23
Median household income
$132,556
±$13,941 (90% margin)
New Hampshire: $99,031
Median home value
$505,200
±$19,574 (90% margin)
New Hampshire: $402,500
Median gross rent
$1,803
±$154 (90% margin)
New Hampshire: $1,491
Where is Londonderry and what county is it in?
Londonderry is a town in Rockingham County, New Hampshire. It covers 42.0 square miles of land, 615 residents per square mile in 2020.
One place lies inside Londonderry: Londonderry (CDP, 11,645 in 2020).
Londonderry 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 Londonderry, and is it growing?
The Census Bureau estimates that 27,844 people lived in Londonderry on July 1, 2025, up 6.9% since 2020, faster than New Hampshire (+2.7%). The 2020 Census counted 25,826 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 26,685 (±23).
| Measure | Londonderry | Rockingham County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 26,685±23 | 319,082 | +758 |
| Households | 9,879±332 | 127,570 | +541 |
| Average household size | 2.70±0.09 | 2.48 | no clear change |
| Housing units | 10,197±335 | 137,794 | +511 |
Londonderry's population since 2000
From 23,236 in 2000 to 27,844 in 2025: up 19.8%. The 2000, 2010 and 2020 figures are census counts, each for Londonderry 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 Londonderry?
The median resident of Londonderry is 42.7 years old; 20.6% are under 18 and 16.4% are 65 or older. The largest group is non-Hispanic white residents at 91.5%, then Hispanic or Latino residents (of any race) at 4.6%. 4.2% of residents were born outside the United States.
| Measure | Londonderry | Rockingham County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 42.7±0.9 | 45.0 | no clear change |
| Under 18 years | 20.6%±1.4 pts | 18.5% | – |
| 65 years and over | 16.4%±1.4 pts | 20.4% | – |
| Male | 51.4%±1.7 pts | 49.7% | – |
| Hispanic or Latino (any race) | 4.6%±1.4 pts | 3.7% | no clear change |
| White alone, not Hispanic | 91.5%±2.1 pts | 89.5% | no clear change |
| Black or African American alone, not Hispanic | 0.3%±0.3 pts | 0.7% | – |
| Asian alone, not Hispanic | 1.4%±0.8 pts | 1.9% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.7%±0.8 pts | 3.6% | – |
| Some other race alone, not Hispanic | 0.4%±0.4 pts | 0.5% | – |
| Born outside the United States | 4.2%±1.2 pts | 5.2% | no clear change |
| Speak a language other than English at home (age 5+) | 5.7%±1.5 pts | 6.5% | – |
| Civilian veterans (age 18+) | 7.4%±1.3 pts | 7.3% | – |
| With a disability | 11.3%±2.0 pts | 11.5% | – |
| No health insurance coverage | 3.6%±1.3 pts | 4.1% | no clear change |
| High school graduate or higher (age 25+) | 97.2%±1.0 pts | 96.1% | – |
| Bachelor's degree or higher (age 25+) | 47.6%±3.3 pts | 45.7% | +4.3 pts |
| Graduate or professional degree (age 25+) | 17.4%±2.1 pts | 17.2% | – |
| Lived in the same house a year earlier | 92.5%±1.8 pts | 91.5% | – |
| Moved from another state in the past year | 3.2%±1.2 pts | 3.2% | – |
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 Londonderry earn?
Half of Londonderry's 9,879 households earn less than $132,556 a year (±$13,941), against $118,331 in Rockingham County and $99,031 in New Hampshire. In 2015-2019 it was $132,752 in 2024 dollars; the margins of error cannot tell the two periods apart. 2.7% of residents live below the poverty line.
| Measure | Londonderry | Rockingham County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $132,556±$13,941 | $118,331 | no clear change |
| Mean household income | $149,934±$8,335 | $149,721 | – |
| Per capita income | $57,050±$2,698 | $61,558 | no clear change |
| People below the poverty line | 2.7%±1.0 pts | 4.8% | no clear change |
| Children under 18 below the poverty line | 1.7%±1.6 pts | 4.6% | – |
| Households receiving SNAP | 1.9%±0.8 pts | 3.3% | – |
| Households with a computer | 98.0%±1.1 pts | 97.3% | – |
| Households with a broadband subscription | 95.7%±3.2 pts | 95.0% | – |
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 Londonderry?
Owners occupy 85.6% of Londonderry's occupied homes and renters 14.4%. The median owner-occupied home is valued at $505,200 by its owner (±$19,574). The median renter pays $1,803 a month including utilities, and 41.4% of renters pay 35% or more of their income on rent.
| Measure | Londonderry | Rockingham County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $505,200±$19,574 | $497,500 | +$110,147 |
| Median gross rent | $1,803±$154 | $1,687 | no clear change |
| Renters paying 35% or more of income on rent | 41.4%±11.2 pts | 39.7% | no clear change |
| Median monthly owner costs, with a mortgage | $2,653±$114 | $2,669 | – |
| Owner-occupied homes | 85.6%±2.9 pts | 78.4% | no clear change |
| Renter-occupied homes | 14.4%±2.9 pts | 21.6% | – |
| Housing units | 10,197±335 | 137,794 | +511 |
| Homeowner vacancy rate | 0.1%±0.2 pts | 0.5% | – |
| Rental vacancy rate | 6.7%±5.8 pts | 3.9% | – |
| Single-family detached homes | 68.7%±3.4 pts | 65.2% | – |
| Mobile homes | 2.7%±1.3 pts | 4.4% | – |
| Built 2020 or later | 4.1%±1.2 pts | 1.9% | – |
| Built 2010 to 2019 | 12.0%±3.1 pts | 8.6% | – |
| Built 1939 or earlier | 2.8%±1.3 pts | 12.5% | – |
| Households with no vehicle | 1.6%±0.9 pts | 3.1% | – |
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 Londonderry building?
Builders took permits for 554 new housing units in Londonderry in 2025 (551 in single-family houses), 19.9 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 Londonderry work and get to work?
69.7% of Londonderry's workers drive alone and 22.8% work from home. The average trip to work takes 28.6 minutes. The unemployment rate in 2020-2024 averaged 5.0%.
| Measure | Londonderry | Rockingham County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 73.7%±2.2 pts | 67.9% | – |
| Unemployment rate | 5.0%±2.3 pts | 3.6% | no clear change |
| Drove alone to work | 69.7%±3.6 pts | 72.1% | – |
| Carpooled | 5.3%±1.7 pts | 5.5% | – |
| Public transportation | 0.3%±0.2 pts | 0.4% | – |
| Walked | 0.5%±0.4 pts | 1.3% | – |
| Worked from home | 22.8%±2.9 pts | 19.4% | +16.7 pts |
| Mean travel time to work | 28.6 min±1.6 | 28.9 min | −2.2 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 Londonderry?
7 census tracts lie mostly in Londonderry (2020 census blocks). Their median household incomes run from $89,775 (Tract 37.01) to $164,543 (Tract 38.01).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 37.03Rockingham County | 6,238 | $117,422 |
| Tract 38.02Rockingham County | 4,493 | $133,191 |
| Tract 37.01Rockingham County | 4,464 | $89,775 |
| Tract 39.01Rockingham County | 4,378 | $111,250 |
| Tract 38.01Rockingham County | 3,729 | $164,543 |
| Tract 39.02Rockingham County | 3,383 | $144,063 |
| Tract 9800.11Rockingham County | 0 | not published |
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 Londonderry) · Census block assignment files
How does Londonderry compare with other places in New Hampshire?
By the Census Bureau's July 2025 estimates, Londonderry is the 397th-most populous of the 16,079 U.S. towns and townships that have one and the 4th-most populous of 221 in New Hampshire.
Londonderry ranks 33rd 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 | 4th | 221 |
| Growth 2020-2025 (PEP) | 11th | 187 |
| Residents per square mile | 64th | 241 |
| Median household income | 33rd | 235 |
| Per capita income | 67th | 240 |
| Median home value | 37th | 239 |
| Median gross rent | 32nd | 221 |
| Poverty rate | 154th | 160 |
| Bachelor's degree or higher | 55th | 239 |
| Median age | 164th | 239 |
| Owner-occupied share | 89th | 241 |
| Work from home | 35th | 214 |
| Travel time to work | 111th | 241 |
Londonderry's figures with every place in New Hampshire (CSV)
Every place in New Hampshire, sortable · Compare Londonderry 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 Londonderry?
9 of the 57 figures for Londonderry 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 Londonderry 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.