Town · Connecticut
Marlborough, Connecticut
Marlborough, town, in Capitol Planning Region, Connecticut. Marlborough had 6,213 residents on July 1, 2025 by the Census Bureau's estimate, up 1.2% since 2020; the 2020 Census counted 6,133 and the ACS 2020-2024 5-year estimates put it at 6,130 (±33). GEOID 0911045820.
Residents, July 2025 estimate
6,213
Census Bureau estimate (no margin published)
2020 Census count: 6,133 · ACS 2020-2024: 6,130 ±33
Median household income
$142,105
±$35,140 (90% margin)
Connecticut: $95,781
Median home value
$379,100
±$32,505 (90% margin)
Connecticut: $366,900
Median gross rent
$1,333
±$438 (90% margin)
Connecticut: $1,488
Where is Marlborough and what county is it in?
Marlborough is a town in Capitol Planning Region, Connecticut. It covers 23.4 square miles of land, 263 residents per square mile in 2020.
One place lies inside Marlborough: Terramuggus (CDP, 990 in 2020).
Marlborough is in the Hartford-West Hartford-East Hartford, CT metropolitan statistical area, which takes in 2 counties (Census Bureau delineation, July 2023).
Marlborough is the same area as Census Tract 5241 of Capitol Planning Region: the tract's figures are Marlborough's own.
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Marlborough, and is it growing?
The Census Bureau estimates that 6,213 people lived in Marlborough on July 1, 2025, up 1.2% since 2020, slower than Connecticut (+2.2%). The 2020 Census counted 6,133 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 6,130 (±33).
| Measure | Marlborough | Capitol Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Total population | 6,130±33 | 977,290 | – |
| Households | 2,184±158 | 391,113 | – |
| Average household size | 2.76±0.20 | 2.41 | – |
| Housing units | 2,253±194 | 416,559 | – |
Marlborough's population since 2000
From 5,709 in 2000 to 6,213 in 2025: up 8.8%. The 2000, 2010 and 2020 figures are census counts, each for Marlborough 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 Marlborough?
The median resident of Marlborough is 41.8 years old; 23.6% are under 18 and 16.3% are 65 or older. The largest group is non-Hispanic white residents at 81.8%, then Hispanic or Latino residents (of any race) at 10.0%. 5.8% of residents were born outside the United States.
| Measure | Marlborough | Capitol Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median age | 41.8±4.7 | 40.0 | – |
| Under 18 years | 23.6%±3.3 pts | 20.2% | – |
| 65 years and over | 16.3%±4.5 pts | 18.0% | – |
| Male | 49.6%±3.5 pts | 49.0% | – |
| Hispanic or Latino (any race) | 10.0%±9.1 pts | 17.7% | – |
| White alone, not Hispanic | 81.8%±8.6 pts | 60.0% | – |
| Black or African American alone, not Hispanic | 1.9%±2.1 pts | 11.5% | – |
| Asian alone, not Hispanic | 5.0%±4.8 pts | 6.0% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.7 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.7 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.1%±1.1 pts | 4.1% | – |
| Some other race alone, not Hispanic | 0.2%±0.4 pts | 0.7% | – |
| Born outside the United States | 5.8%±3.3 pts | 15.2% | – |
| Speak a language other than English at home (age 5+) | 13.1%±6.8 pts | 24.1% | – |
| Civilian veterans (age 18+) | 6.0%±3.0 pts | 4.5% | – |
| With a disability | 9.5%±3.4 pts | 12.4% | – |
| No health insurance coverage | 2.2%±2.3 pts | 4.5% | – |
| High school graduate or higher (age 25+) | 97.4%±1.8 pts | 91.4% | – |
| Bachelor's degree or higher (age 25+) | 45.9%±9.1 pts | 42.1% | – |
| Graduate or professional degree (age 25+) | 21.2%±6.0 pts | 18.8% | – |
| Lived in the same house a year earlier | 95.0%±2.4 pts | 89.0% | – |
| Moved from another state in the past year | 0.4%±0.5 pts | 2.2% | – |
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 Marlborough earn?
Half of Marlborough's 2,184 households earn less than $142,105 a year (±$35,140), against $93,394 in Capitol Planning Region and $95,781 in Connecticut.
| Measure | Marlborough | Capitol Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $142,105±$35,140 | $93,394 | – |
| Mean household income | $169,394±$19,508 | $125,847 | – |
| Per capita income | $60,414±$8,779 | $51,016 | – |
| People below the poverty line | 9.7%±7.7 pts | 10.3% | – |
| Children under 18 below the poverty line | 8.3%±9.1 pts | 13.0% | – |
| Households receiving SNAP | 1.9%±2.4 pts | 13.1% | – |
| Households with a computer | 97.8%±2.1 pts | 95.4% | – |
| Households with a broadband subscription | 97.5%±2.6 pts | 91.5% | – |
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 Marlborough?
Owners occupy 92.6% of Marlborough's occupied homes and renters 7.4%. The median owner-occupied home is valued at $379,100 by its owner (±$32,505). The median renter pays $1,333 a month including utilities.
| Measure | Marlborough | Capitol Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $379,100±$32,505 | $323,700 | – |
| Median gross rent | $1,333±$438 | $1,411 | – |
| Renters paying 35% or more of income on rent | 43.0%±28.9 pts | 43.2% | – |
| Median monthly owner costs, with a mortgage | $2,663±$212 | $2,284 | – |
| Owner-occupied homes | 92.6%±3.6 pts | 65.7% | – |
| Renter-occupied homes | 7.4%±3.6 pts | 34.3% | – |
| Housing units | 2,253±194 | 416,559 | – |
| Homeowner vacancy rate | 0.0%±2.1 pts | 0.6% | – |
| Rental vacancy rate | 0.0%±22.9 pts | 4.8% | – |
| Single-family detached homes | 89.8%±6.4 pts | 56.7% | – |
| Mobile homes | 0.7%±1.2 pts | 0.6% | – |
| Built 2020 or later | 0.6%±1.0 pts | 0.6% | – |
| Built 2010 to 2019 | 1.4%±1.7 pts | 4.3% | – |
| Built 1939 or earlier | 7.4%±4.1 pts | 18.2% | – |
| Households with no vehicle | 2.3%±2.6 pts | 9.8% | – |
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 Marlborough building?
Builders took permits for 5 new housing units in Marlborough in 2025 (5 in single-family houses), 0.8 per 1,000 residents against 2.0 across Connecticut.
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 Marlborough work and get to work?
58.7% of Marlborough's workers drive alone and 33.2% work from home. The average trip to work takes 34.1 minutes.
| Measure | Marlborough | Capitol Planning Region | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 73.6%±7.4 pts | 65.9% | – |
| Unemployment rate | 5.5%±6.0 pts | 5.2% | – |
| Drove alone to work | 58.7%±8.5 pts | 69.7% | – |
| Carpooled | 5.1%±5.0 pts | 7.5% | – |
| Public transportation | 0.0%±1.3 pts | 2.7% | – |
| Walked | 0.6%±0.9 pts | 1.7% | – |
| Worked from home | 33.2%±7.6 pts | 16.9% | – |
| Mean travel time to work | 34.1 min±6.1 | 23.6 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 Marlborough?
1 census tract lies mostly in Marlborough (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 5241Capitol Planning Region | 6,130 | $142,105 |
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 Marlborough) · Census block assignment files
How does Marlborough compare with other places in Connecticut?
By the Census Bureau's July 2025 estimates, Marlborough is the 1,923rd-most populous of the 16,079 U.S. towns and townships that have one and the 96th-most populous of 142 in Connecticut.
Marlborough ranks 70th of 294 places in Connecticut with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 96th | 142 |
| Growth 2020-2025 (PEP) | 127th | 167 |
| Residents per square mile | 247th | 303 |
| Median household income | 70th | 294 |
| Per capita income | 121st | 303 |
| Median home value | 144th | 300 |
| Median gross rent | 183rd | 266 |
| Bachelor's degree or higher | 147th | 297 |
| Median age | 209th | 301 |
| Owner-occupied share | 30th | 300 |
| Work from home | 27th | 279 |
| Travel time to work | 40th | 302 |
Marlborough's figures with every place in Connecticut (CSV)
Every place in Connecticut, sortable · Compare Marlborough 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 Marlborough?
23 of the 57 figures for Marlborough 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 Marlborough 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.