Census-designated place · Massachusetts
Belmont, Massachusetts
Belmont, census-designated place, in Middlesex County, Massachusetts. Belmont had 27,175 people in the ACS 2020-2024 5-year estimates (±44). GEOID 2505105.
Residents, 2020-2024
27,175
±44 (90% margin)
2020 Census count: 27,295
Median household income
$183,137
±$14,328 (90% margin)
Massachusetts: $103,960
Median home value
$1,159,000
±$33,086 (90% margin)
Massachusetts: $562,100
Median gross rent
$2,527
±$105 (90% margin)
Massachusetts: $1,762
Where is Belmont and what county is it in?
Belmont is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Middlesex County, Massachusetts. It covers 4.6 square miles of land, 5,874 residents per square mile in 2020.
Belmont 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 Belmont, and is it growing?
The 2020-2024 American Community Survey puts Belmont's population at 27,175 (±44). The 2020 Census counted 27,295 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; Belmont is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Belmont | Middlesex County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 27,175 ±44 | 1,638,365 | +1,062 |
| Households | 10,412 ±287 | 634,215 | +593 |
| Average household size | 2.59 ±0.07 | 2.49 | no clear change |
| Housing units | 10,881 ±296 | 664,267 | +645 |
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 Belmont?
The median resident of Belmont is 42.9 years old; 24.2% are under 18 and 19.3% are 65 or older. The largest group is non-Hispanic white residents at 68.8%, then non-Hispanic Asian residents at 19.5%. 26.2% of residents were born outside the United States.
| Measure | Belmont | Middlesex County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 42.9 ±1.0 | 38.9 | +1.8 |
| Under 18 years | 24.2% ±1.5 pts | 19.5% | – |
| 65 years and over | 19.3% ±1.6 pts | 16.3% | – |
| Male | 48.2% ±1.4 pts | 49.4% | – |
| Hispanic or Latino (any race) | 4.9% ±1.1 pts | 9.3% | no clear change |
| White alone, not Hispanic | 68.8% ±2.5 pts | 65.1% | −4.4 pts |
| Black or African American alone, not Hispanic | 1.6% ±0.9 pts | 4.7% | no clear change |
| Asian alone, not Hispanic | 19.5% ±2.1 pts | 13.6% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.2 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 | 4.5% ±1.0 pts | 5.8% | – |
| Some other race alone, not Hispanic | 0.6% ±0.5 pts | 1.4% | – |
| Born outside the United States | 26.2% ±2.1 pts | 23.1% | no clear change |
| Speak a language other than English at home (age 5+) | 32.3% ±2.5 pts | 29.1% | – |
| Civilian veterans (age 18+) | 2.2% ±0.5 pts | 3.3% | – |
| With a disability | 8.3% ±1.1 pts | 9.9% | – |
| No health insurance coverage | 1.8% ±0.7 pts | 2.4% | no clear change |
| High school graduate or higher (age 25+) | 97.7% ±0.9 pts | 93.2% | – |
| Bachelor's degree or higher (age 25+) | 80.9% ±1.8 pts | 59.5% | +5.5 pts |
| Graduate or professional degree (age 25+) | 51.6% ±2.3 pts | 30.5% | – |
| Lived in the same house a year earlier | 87.4% ±1.8 pts | 87.2% | – |
| Moved from another state in the past year | 3.3% ±1.0 pts | 2.7% | – |
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 Belmont earn?
Half of Belmont's 10,412 households earn less than $183,137 a year (±$14,328), against $130,847 in Middlesex County and $103,960 in Massachusetts. In 2015-2019 the median was $159,227 in 2024 dollars, so it rose by $23,910 after inflation. 3.6% of residents live below the poverty line.
| Measure | Belmont | Middlesex County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $183,137 ±$14,328 | $130,847 | +$23,910 |
| Mean household income | $246,939 ±$16,663 | $178,070 | – |
| Per capita income | $95,484 ±$6,007 | $69,556 | +$12,240 |
| People below the poverty line | 3.6% ±1.0 pts | 7.7% | −2.4 pts |
| Children under 18 below the poverty line | 2.7% ±1.4 pts | 7.9% | no clear change |
| Households receiving SNAP | 5.8% ±1.4 pts | 9.3% | – |
| Households with a computer | 97.2% ±1.3 pts | 97.0% | – |
| Households with a broadband subscription | 96.4% ±1.3 pts | 94.7% | – |
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 Belmont?
Owners occupy 64.7% of Belmont's occupied homes and renters 35.3%. The median owner-occupied home is valued at $1,159,000 by its owner (±$33,086). The median renter pays $2,527 a month including utilities, and 36.7% of renters pay 35% or more of their income on rent.
| Measure | Belmont | Middlesex County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $1,159,000 ±$33,086 | $727,800 | +$101,096 |
| Median gross rent | $2,527 ±$105 | $2,201 | no clear change |
| Renters paying 35% or more of income on rent | 36.7% ±5.8 pts | 37.6% | no clear change |
| Median monthly owner costs, with a mortgage | $4,000 or more | $3,224 | – |
| Owner-occupied homes | 64.7% ±2.9 pts | 61.3% | no clear change |
| Renter-occupied homes | 35.3% ±2.9 pts | 38.7% | – |
| Housing units | 10,881 ±296 | 664,267 | +645 |
| Homeowner vacancy rate | 0.5% ±0.5 pts | 0.6% | – |
| Rental vacancy rate | 1.3% ±1.2 pts | 3.4% | – |
| Single-family detached homes | 45.4% ±2.3 pts | 46.5% | – |
| Mobile homes | 0.0% ±0.4 pts | 0.4% | – |
| Built 2020 or later | 1.2% ±0.6 pts | 1.2% | – |
| Built 2010 to 2019 | 5.7% ±1.4 pts | 7.3% | – |
| Built 1939 or earlier | 57.1% ±3.3 pts | 32.3% | – |
| Households with no vehicle | 7.1% ±1.6 pts | 10.3% | – |
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 do people in Belmont work and get to work?
48.2% of Belmont's workers drive alone and 31.5% work from home. The average trip to work takes 29.3 minutes. The unemployment rate in 2020-2024 averaged 4.3%.
| Measure | Belmont | Middlesex County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 68.3% ±2.0 pts | 69.9% | – |
| Unemployment rate | 4.3% ±1.3 pts | 4.4% | no clear change |
| Drove alone to work | 48.2% ±3.1 pts | 54.2% | – |
| Carpooled | 4.3% ±1.2 pts | 6.3% | – |
| Public transportation | 9.3% ±1.3 pts | 7.2% | – |
| Walked | 2.2% ±0.8 pts | 4.2% | – |
| Worked from home | 31.5% ±3.0 pts | 24.7% | +23.6 pts |
| Mean travel time to work | 29.3 min ±0.9 | 29.9 min | −1.8 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 Belmont?
8 census tracts lie mostly in Belmont (2020 census blocks). Their median household incomes run from $138,958 (Tract 3577) to $250,000 or more (Tract 3572).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 3571Middlesex County | 5,134 | $172,404 |
| Tract 3577Middlesex County | 3,993 | $138,958 |
| Tract 3578Middlesex County | 3,920 | $235,063 |
| Tract 3573Middlesex County | 3,278 | $167,738 |
| Tract 3572Middlesex County | 3,167 | $250,000 or more |
| Tract 3576Middlesex County | 2,883 | $193,611 |
| Tract 3574Middlesex County | 2,426 | $220,357 |
| Tract 3575Middlesex County | 2,374 | $167,563 |
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 Belmont) · Census block assignment files
How does Belmont compare with other places in Massachusetts?
Belmont ranks 47th of 453 places in Massachusetts with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 72nd | 460 |
| Residents per square mile | 17th | 461 |
| Median household income | 47th | 453 |
| Per capita income | 34th | 460 |
| Median home value | 22nd | 459 |
| Median gross rent | 21st | 410 |
| Poverty rate | 288th | 338 |
| Bachelor's degree or higher | 14th | 459 |
| Median age | 289th | 461 |
| Owner-occupied share | 373rd | 460 |
| Work from home | 42nd | 429 |
| Travel time to work | 246th | 459 |
Belmont's figures with every place in Massachusetts (CSV)
Every place in Massachusetts, sortable · Compare Belmont 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 Belmont?
6 of the 57 figures for Belmont 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 Belmont 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.