Census tract · Norfolk County
Census Tract 4004.01, Norfolk County, Massachusetts
Census Tract 4004.01, GEOID 25021400401, in Norfolk County, Massachusetts, entirely within Brookline. 3,939 residents in the ACS 2020-2024 5-year estimates (±629); the 2020 Census counted 3,890.
Residents, 2020-2024
3,939
±629 (90% margin)
2020 Census count: 3,890
Median household income
$84,928
±$16,684 (90% margin)
Norfolk County: $130,739
Median home value
$1,067,000
±$131,817 (90% margin)
Norfolk County: $683,900
Median gross rent
$2,442
±$417 (90% margin)
Norfolk County: $2,149
Where is Census Tract 4004.01?
Census Tract 4004.01 is one of 154 census tracts in Norfolk County, Massachusetts. It covers 0.13 square miles of land, 30,391 residents per square mile in 2020. Its GEOID, 25021400401, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Brookline | 100% |
6 census tracts border Census Tract 4004.01: Tract 4002.01 ($125,658), Tract 4003 ($190,667), Tract 4004.02 ($250,000 or more), Tract 4005 ($154,688), Tract 4008 ($143,723) and Tract 7.01 in Suffolk County ($99,679). 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 4004.01?
The 2020-2024 American Community Survey puts Census Tract 4004.01's population at 3,939 (±629) in 2,139 households; the 2020 Census counted 3,890 residents and 2,169 housing units.
| Measure | Tract 4004.01 | Brookline |
|---|---|---|
| Total population | 3,939±629 | 63,266 |
| Households | 2,139±305 | 27,587 |
| Average household size | 1.83±0.17 | 2.24 |
| Housing units | 2,267±268 | 28,873 |
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 4004.01?
The median resident of Census Tract 4004.01 is 37.5 years old; 10.7% are under 18 and 22.3% are 65 or older. The largest group is non-Hispanic white residents at 66.2%, then non-Hispanic Asian residents at 14.7%. 30.0% of residents were born outside the United States.
| Measure | Tract 4004.01 | Brookline |
|---|---|---|
| Median age | 37.5±7.3 | 35.2 |
| Under 18 years | 10.7%±4.4 pts | 18.7% |
| 65 years and over | 22.3%±6.5 pts | 15.8% |
| Hispanic or Latino (any race) | 2.0%±1.5 pts | 6.2% |
| White alone, not Hispanic | 66.2%±10.2 pts | 64.1% |
| Black or African American alone, not Hispanic | 9.9%±8.5 pts | 3.0% |
| Asian alone, not Hispanic | 14.7%±7.7 pts | 19.3% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.1 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.1 pts | 0.0% |
| Two or more races, not Hispanic | 7.3%±4.9 pts | 6.8% |
| Some other race alone, not Hispanic | 0.0%±1.1 pts | 0.6% |
| Born outside the United States | 30.0%±8.4 pts | 27.8% |
| Speak a language other than English at home (age 5+) | 32.9%±10.4 pts | 31.2% |
| Civilian veterans (age 18+) | 6.3%±5.2 pts | 2.0% |
| With a disability | 15.9%±5.0 pts | 7.5% |
| No health insurance coverage | 0.8%±0.9 pts | 1.0% |
| High school graduate or higher (age 25+) | 91.5%±10.0 pts | 97.6% |
| Bachelor's degree or higher (age 25+) | 82.4%±9.7 pts | 85.4% |
| Graduate or professional degree (age 25+) | 57.2%±10.3 pts | 57.9% |
| Lived in the same house a year earlier | 73.2%±8.4 pts | 78.8% |
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 4004.01 earn?
Half of the 2,139 households in Census Tract 4004.01 earn less than $84,928 a year (±$16,684), against $130,739 across Norfolk County: 139th highest of the county's 152 tracts with a reliable estimate. 11.3% of residents live below the poverty line.
| Measure | Tract 4004.01 | Brookline |
|---|---|---|
| Median household income | $84,928±$16,684 | $142,101 |
| Mean household income | $129,533±$18,789 | $219,714 |
| Per capita income | $73,378±$10,982 | $96,682 |
| People below the poverty line | 11.3%±5.2 pts | 8.7% |
| Children under 18 below the poverty line | 4.8%±8.7 pts | 4.7% |
| Households receiving SNAP | 14.1%±8.3 pts | 6.1% |
| Households with a computer | 92.4%±7.1 pts | 97.3% |
| Households with a broadband subscription | 89.6%±6.8 pts | 96.1% |
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 4004.01?
Owners occupy 21.4% of Census Tract 4004.01's occupied homes and renters 78.6%. The median owner-occupied home is valued at $1,067,000 by its owner (±$131,817). The median renter pays $2,442 a month including utilities, and 42.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 4004.01 | Brookline |
|---|---|---|
| Median home value (owner-occupied) | $1,067,000±$131,817 | $1,246,800 |
| Median gross rent | $2,442±$417 | $2,835 |
| Renters paying 35% or more of income on rent | 42.3%±12.3 pts | 37.6% |
| Median monthly owner costs, with a mortgage | $3,026±$333 | $4,000 or more |
| Owner-occupied homes | 21.4%±6.3 pts | 46.9% |
| Renter-occupied homes | 78.6%±6.3 pts | 53.1% |
| Housing units | 2,267±268 | 28,873 |
| Single-family detached homes | 3.2%±2.3 pts | 18.3% |
| Mobile homes | 0.0%±1.9 pts | 0.0% |
| Built 2020 or later | 0.7%±1.2 pts | 0.4% |
| Built 2010 to 2019 | 3.2%±3.4 pts | 2.7% |
| Built 1939 or earlier | 45.3%±8.7 pts | 51.7% |
| Households with no vehicle | 47.5%±10.4 pts | 26.9% |
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 4004.01 get to work?
22.5% of Census Tract 4004.01's workers drive alone and 32.7% work from home. The average trip to work takes 33.5 minutes. The unemployment rate in 2020-2024 averaged 10.9%.
| Measure | Tract 4004.01 | Brookline |
|---|---|---|
| In the labor force (age 16+) | 64.9%±8.7 pts | 73.2% |
| Unemployment rate | 10.9%±6.0 pts | 3.6% |
| Drove alone to work | 22.5%±6.7 pts | 28.4% |
| Carpooled | 0.0%±2.0 pts | 3.2% |
| Public transportation | 24.5%±9.2 pts | 18.1% |
| Walked | 13.0%±7.7 pts | 14.9% |
| Worked from home | 32.7%±9.4 pts | 30.1% |
| Mean travel time to work | 33.5 min±3.5 | 27.1 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 4004.01 compare with the other tracts in Norfolk County?
Among Norfolk County's tracts with a reliable estimate, Census Tract 4004.01 ranks as shown below (1 = highest).
| Measure | In Norfolk County | In Brookline |
|---|---|---|
| Population | 109th of 153 | 10th of 15 |
| Residents per square mile | 2nd of 154 | 2nd of 15 |
| Median household income | 139th of 152 | 13th of 14 |
| Per capita income | 58th of 153 | 14th of 15 |
| Median home value | 27th of 153 | 12th of 15 |
| Median gross rent | 43rd of 130 | 14th of 15 |
| Poverty rate | 21st of 89 | 4th of 10 |
| Bachelor's degree or higher | 22nd of 153 | 12th of 15 |
| Median age | 123rd of 153 | 5th of 15 |
| Owner-occupied share | 152nd of 153 | 15th of 15 |
The tracts next to it on Norfolk County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4222.02 | 136th | $88,989±$13,205 · within the margin of this tract |
| Tract 4203.02 | 137th | $88,589±$27,241 · within the margin of this tract |
| Tract 4225.01 | 138th | $87,614±$24,429 · within the margin of this tract |
| Tract 4004.01 | 139th | $84,928±$16,684 |
| Tract 4401.01 | 140th | $84,631±$26,680 · within the margin of this tract |
| Tract 4021.02 | 141st | $83,766±$8,469 · within the margin of this tract |
| Tract 4180.04 | 142nd | $82,271±$23,747 · 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 4004.01?
2 of the 18 figures for Census Tract 4004.01 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.
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