PlainCities

Census tract · Middlesex County

Census Tract 3566.01, Middlesex County, Massachusetts

Census Tract 3566.01, GEOID 25017356601, in Middlesex County, Massachusetts, entirely within Arlington. 4,103 residents in the ACS 2020-2024 5-year estimates (±394); the 2020 Census counted 4,783.

Residents, 2020-2024

4,103

±394 (90% margin)
2020 Census count: 4,783

Median household income

$148,506

±$10,777 (90% margin)
Middlesex County: $130,847

Median home value

$896,000

±$53,983 (90% margin)
Middlesex County: $727,800

Median gross rent

$2,099

±$137 (90% margin)
Middlesex County: $2,201

Where is Census Tract 3566.01?

Census Tract 3566.01 is one of 357 census tracts in Middlesex County, Massachusetts. It covers 0.50 square miles of land, 9,528 residents per square mile in 2020. Its GEOID, 25017356601, names it uniquely (how tract numbers and GEOIDs work).

Places Census Tract 3566.01 lies in (share of its 2020 census blocks)
PlaceShare of the tract
Arlington100%
Census Tract 3566.01 (marked with a dot) in Middlesex County, Massachusetts. Boundaries: Census Bureau 2024.
356435653566.023567.0435713578 3566.01 0.5 mi
Census Tract 3566.01 (shaded) and the tracts that border it, numbered. Boundaries: Census Bureau 2024 cartographic boundary file, 1:500,000.

6 census tracts border Census Tract 3566.01: Tract 3564 ($203,000), Tract 3565 ($149,844), Tract 3566.02 ($181,117), Tract 3567.04 ($164,453), Tract 3571 ($172,404) and Tract 3578 ($235,063). 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 3566.01?

The 2020-2024 American Community Survey puts Census Tract 3566.01's population at 4,103 (±394) in 2,099 households; the 2020 Census counted 4,783 residents and 2,186 housing units.

Counts, ACS 2020-2024 5-year estimates
MeasureTract 3566.01ArlingtonMiddlesex CountyMassachusetts
Total population4,103±39446,3501,638,3657,044,056
Households2,099±16520,005634,2152,785,042
Average household size1.95±0.112.302.492.44
Housing units2,185±15720,746664,2673,030,406

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 3566.01?

The median resident of Census Tract 3566.01 is 45.8 years old; 17.7% are under 18 and 16.8% are 65 or older. The largest group is non-Hispanic white residents at 68.8%, then non-Hispanic Asian residents at 15.7%. 21.0% of residents were born outside the United States.

Age, origin, education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
MeasureTract 3566.01ArlingtonMiddlesex CountyMassachusetts
Median age45.8±4.841.638.940.0
Under 18 years17.7%±2.7 pts20.5%19.5%19.4%
65 years and over16.8%±3.0 pts17.3%16.3%17.9%
Hispanic or Latino (any race)4.3%±3.0 pts4.9%9.3%13.3%
White alone, not Hispanic68.8%±7.2 pts73.8%65.1%66.6%
Black or African American alone, not Hispanic2.1%±2.4 pts2.0%4.7%6.4%
Asian alone, not Hispanic15.7%±4.9 pts13.0%13.6%7.3%
American Indian and Alaska Native alone, not Hispanic0.0%±1.0 pts0.1%0.1%0.1%
Native Hawaiian and Other Pacific Islander alone, not Hispanic0.0%±1.0 pts0.0%0.0%0.0%
Two or more races, not Hispanic7.7%±3.4 pts5.4%5.8%5.1%
Some other race alone, not Hispanic1.4%±2.2 pts0.8%1.4%1.2%
Born outside the United States21.0%±5.9 pts18.6%23.1%18.0%
Speak a language other than English at home (age 5+)25.0%±7.1 pts22.0%29.1%25.1%
Civilian veterans (age 18+)3.1%±2.4 pts2.8%3.3%4.3%
With a disability7.0%±2.6 pts8.6%9.9%12.3%
No health insurance coverage0.5%±0.6 pts1.0%2.4%2.6%
High school graduate or higher (age 25+)96.5%±2.9 pts98.0%93.2%91.4%
Bachelor's degree or higher (age 25+)77.6%±6.6 pts76.1%59.5%47.3%
Graduate or professional degree (age 25+)48.9%±7.6 pts46.5%30.5%21.8%
Lived in the same house a year earlier88.7%±4.3 pts86.1%87.2%88.3%

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 3566.01 earn?

Half of the 2,099 households in Census Tract 3566.01 earn less than $148,506 a year (±$10,777), against $130,847 across Middlesex County: 132nd highest of the county's 350 tracts with a reliable estimate.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
MeasureTract 3566.01ArlingtonMiddlesex CountyMassachusetts
Median household income$148,506±$10,777$150,701$130,847$103,960
Mean household income$172,938±$21,862$211,725$178,070$144,950
Per capita income$87,694±$11,640$91,718$69,556$57,897
People below the poverty line3.6%±3.3 pts5.4%7.7%10.0%
Children under 18 below the poverty line9.0%±9.7 pts2.3%7.9%11.7%
Households receiving SNAP6.1%±4.1 pts6.0%9.3%14.7%
Households with a computer97.5%±2.2 pts96.7%97.0%95.7%
Households with a broadband subscription94.4%±3.3 pts95.6%94.7%92.8%

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 3566.01?

Owners occupy 55.9% of Census Tract 3566.01's occupied homes and renters 44.1%. The median owner-occupied home is valued at $896,000 by its owner (±$53,983). The median renter pays $2,099 a month including utilities, and 29.5% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
MeasureTract 3566.01ArlingtonMiddlesex CountyMassachusetts
Median home value (owner-occupied)$896,000±$53,983$933,800$727,800$562,100
Median gross rent$2,099±$137$2,082$2,201$1,762
Renters paying 35% or more of income on rent29.5%±11.2 pts23.9%37.6%41.8%
Median monthly owner costs, with a mortgage$3,668±$294$3,831$3,224$2,726
Owner-occupied homes55.9%±7.4 pts61.6%61.3%62.5%
Renter-occupied homes44.1%±7.4 pts38.4%38.7%37.5%
Housing units2,185±15720,746664,2673,030,406
Single-family detached homes40.1%±5.3 pts37.9%46.5%51.1%
Mobile homes0.9%±1.4 pts0.3%0.4%0.8%
Built 2020 or later0.0%±1.9 pts0.9%1.2%1.0%
Built 2010 to 20191.1%±1.2 pts3.7%7.3%6.2%
Built 1939 or earlier47.8%±8.0 pts47.1%32.3%30.5%
Households with no vehicle15.5%±5.7 pts9.4%10.3%11.7%

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 3566.01 get to work?

45.3% of Census Tract 3566.01's workers drive alone and 29.9% work from home. The average trip to work takes 33.8 minutes.

Work and commuting, ACS 2020-2024 5-year estimates
MeasureTract 3566.01ArlingtonMiddlesex CountyMassachusetts
In the labor force (age 16+)78.0%±5.7 pts74.2%69.9%67.0%
Unemployment rate2.6%±2.2 pts2.9%4.4%5.2%
Drove alone to work45.3%±7.5 pts43.5%54.2%61.2%
Carpooled3.3%±2.4 pts3.0%6.3%7.0%
Public transportation13.9%±5.8 pts11.1%7.2%6.5%
Walked3.4%±3.7 pts2.0%4.2%4.1%
Worked from home29.9%±8.1 pts34.5%24.7%18.6%
Mean travel time to work33.8 min±4.132.2 min29.9 min29.1 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 3566.01 compare with the other tracts in Middlesex County?

Among Middlesex County's tracts with a reliable estimate, Census Tract 3566.01 ranks as shown below (1 = highest).

Census Tract 3566.01's rank among the tracts of Middlesex County and of Arlington
MeasureIn Middlesex CountyIn Arlington
Population206th of 3546th of 9
Residents per square mile119th of 3574th of 9
Median household income132nd of 3506th of 9
Per capita income74th of 3545th of 9
Median home value101st of 3506th of 9
Median gross rent191st of 3274th of 8
Bachelor's degree or higher85th of 3544th of 9
Median age53rd of 3542nd of 9
Owner-occupied share204th of 3516th of 9

The tracts next to it on Middlesex County's income ladder

Median household income, ACS 2020-2024 5-year estimates
TractRankMedian household incomeResidents
Tract 3396129th$150,074±$38,974 · within the margin of this tract5,431
Tract 3565130th$149,844±$29,620 · within the margin of this tract7,214
Tract 3821131st$148,750±$10,638 · within the margin of this tract4,826
Tract 3566.01132nd$148,506±$10,7774,103
Tract 3567.01133rd$148,363±$20,003 · within the margin of this tract6,450
Tract 3251.01134th$148,258±$30,814 · within the margin of this tract4,195
Tract 3173.02135th$147,596±$26,623 · within the margin of this tract5,677

"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 3566.01?

3 of the 18 figures for Census Tract 3566.01 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