Census tract · Middlesex County
Census Tract 3503, Middlesex County, Massachusetts
Census Tract 3503, GEOID 25017350300, in Middlesex County, Massachusetts, entirely within Somerville. 2,848 residents in the ACS 2020-2024 5-year estimates (±408); the 2020 Census counted 2,984.
Residents, 2020-2024
2,848
±408 (90% margin)
2020 Census count: 2,984
Median household income
$143,889
±$37,078 (90% margin)
Middlesex County: $130,847
Median home value
$895,700
±$123,305 (90% margin)
Middlesex County: $727,800
Median gross rent
$2,849
±$128 (90% margin)
Middlesex County: $2,201
Where is Census Tract 3503?
Census Tract 3503 is one of 357 census tracts in Middlesex County, Massachusetts. It covers 0.15 square miles of land, 19,377 residents per square mile in 2020. Its GEOID, 25017350300, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Somerville | 100% |
5 census tracts border Census Tract 3503: Tract 3396 ($150,074), Tract 3502.02 ($132,159), Tract 3504 ($166,831), Tract 3510.02 ($142,589) and Tract 3511.01 ($129,594). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 3503?
The 2020-2024 American Community Survey puts Census Tract 3503's population at 2,848 (±408) in 1,380 households; the 2020 Census counted 2,984 residents and 1,364 housing units.
| Measure | Tract 3503 | Somerville |
|---|---|---|
| Total population | 2,848±408 | 81,036 |
| Households | 1,380±240 | 35,715 |
| Average household size | 2.05±0.19 | 2.19 |
| Housing units | 1,484±243 | 37,756 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 3503?
The median resident of Census Tract 3503 is 34.8 years old; 11.7% are under 18 and 8.0% are 65 or older. The largest group is non-Hispanic white residents at 65.4%, then non-Hispanic Asian residents at 16.6%. 30.0% of residents were born outside the United States.
| Measure | Tract 3503 | Somerville |
|---|---|---|
| Median age | 34.8±2.4 | 31.9 |
| Under 18 years | 11.7%±2.8 pts | 9.8% |
| 65 years and over | 8.0%±2.7 pts | 10.0% |
| Hispanic or Latino (any race) | 9.0%±4.6 pts | 11.4% |
| White alone, not Hispanic | 65.4%±7.5 pts | 65.6% |
| Black or African American alone, not Hispanic | 2.5%±2.1 pts | 4.4% |
| Asian alone, not Hispanic | 16.6%±7.1 pts | 11.5% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.5 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.5%±0.8 pts | 0.1% |
| Two or more races, not Hispanic | 5.6%±3.2 pts | 5.6% |
| Some other race alone, not Hispanic | 0.4%±0.6 pts | 1.4% |
| Born outside the United States | 30.0%±11.3 pts | 24.0% |
| Speak a language other than English at home (age 5+) | 28.2%±9.0 pts | 28.6% |
| Civilian veterans (age 18+) | 2.5%±1.7 pts | 1.4% |
| With a disability | 7.5%±3.0 pts | 8.5% |
| No health insurance coverage | 0.8%±1.0 pts | 1.9% |
| High school graduate or higher (age 25+) | 91.9%±4.6 pts | 92.9% |
| Bachelor's degree or higher (age 25+) | 67.9%±6.9 pts | 69.4% |
| Graduate or professional degree (age 25+) | 33.9%±8.4 pts | 33.4% |
| Lived in the same house a year earlier | 75.5%±7.5 pts | 75.6% |
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 Census Tract 3503 earn?
Half of the 1,380 households in Census Tract 3503 earn less than $143,889 a year (±$37,078), against $130,847 across Middlesex County: 148th highest of the county's 350 tracts with a reliable estimate. 13.1% of residents live below the poverty line.
| Measure | Tract 3503 | Somerville |
|---|---|---|
| Median household income | $143,889±$37,078 | $132,572 |
| Mean household income | $163,874±$33,470 | $167,361 |
| Per capita income | $79,441±$13,390 | $73,940 |
| People below the poverty line | 13.1%±6.9 pts | 9.8% |
| Children under 18 below the poverty line | 9.0%±14.4 pts | 6.7% |
| Households receiving SNAP | 8.3%±5.4 pts | 8.5% |
| Households with a computer | 92.9%±5.4 pts | 97.5% |
| Households with a broadband subscription | 90.2%±6.1 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 Census Tract 3503?
Owners occupy 36.9% of Census Tract 3503's occupied homes and renters 63.1%. The median owner-occupied home is valued at $895,700 by its owner (±$123,305). The median renter pays $2,849 a month including utilities, and 40.2% of renters pay 35% or more of their income on rent.
| Measure | Tract 3503 | Somerville |
|---|---|---|
| Median home value (owner-occupied) | $895,700±$123,305 | $911,300 |
| Median gross rent | $2,849±$128 | $2,517 |
| Renters paying 35% or more of income on rent | 40.2%±17.1 pts | 27.5% |
| Median monthly owner costs, with a mortgage | $2,787±$275 | $3,452 |
| Owner-occupied homes | 36.9%±8.1 pts | 34.2% |
| Renter-occupied homes | 63.1%±8.1 pts | 65.8% |
| Housing units | 1,484±243 | 37,756 |
| Single-family detached homes | 23.2%±7.7 pts | 10.5% |
| Mobile homes | 0.0%±2.8 pts | 0.1% |
| Built 2020 or later | 0.5%±0.9 pts | 1.5% |
| Built 2010 to 2019 | 23.8%±12.6 pts | 8.1% |
| Built 1939 or earlier | 41.8%±8.9 pts | 59.0% |
| Households with no vehicle | 28.4%±13.2 pts | 21.6% |
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 Census Tract 3503 get to work?
27.9% of Census Tract 3503's workers drive alone and 34.5% work from home. The average trip to work takes 32.0 minutes.
| Measure | Tract 3503 | Somerville |
|---|---|---|
| In the labor force (age 16+) | 80.4%±6.0 pts | 79.0% |
| Unemployment rate | 0.4%±0.5 pts | 3.0% |
| Drove alone to work | 27.9%±7.2 pts | 29.9% |
| Carpooled | 4.7%±3.1 pts | 4.7% |
| Public transportation | 20.0%±6.3 pts | 19.3% |
| Walked | 3.9%±2.4 pts | 8.5% |
| Worked from home | 34.5%±8.9 pts | 31.3% |
| Mean travel time to work | 32.0 min±3.2 | 31.0 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
How does Census Tract 3503 compare with the other tracts in Middlesex County?
Among Middlesex County's tracts with a reliable estimate, Census Tract 3503 ranks as shown below (1 = highest).
| Measure | In Middlesex County | In Somerville |
|---|---|---|
| Population | 309th of 354 | 17th of 25 |
| Residents per square mile | 52nd of 357 | 19th of 25 |
| Median household income | 148th of 350 | 8th of 24 |
| Per capita income | 109th of 354 | 11th of 25 |
| Median home value | 102nd of 350 | 16th of 25 |
| Median gross rent | 47th of 327 | 5th of 25 |
| Poverty rate | 62nd of 223 | 5th of 18 |
| Bachelor's degree or higher | 143rd of 354 | 15th of 25 |
| Median age | 272nd of 354 | 6th of 25 |
| Owner-occupied share | 284th of 351 | 13th of 25 |
The tracts next to it on Middlesex County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 3838 | 145th | $144,427±$46,982 · within the margin of this tract |
| Tract 3702.01 | 146th | $144,375±$29,144 · within the margin of this tract |
| Tract 3172.03 | 147th | $143,935±$34,886 · within the margin of this tract |
| Tract 3503 | 148th | $143,889±$37,078 |
| Tract 3682 | 149th | $143,857±$26,918 · within the margin of this tract |
| Tract 3352 | 150th | $143,008±$25,346 · within the margin of this tract |
| Tract 3324.01 | 151st | $142,986±$45,566 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 3503?
1 of the 18 figures for Census Tract 3503 on this page carries a coefficient of variation over 40% and is marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). 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 · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections