PlainCities

Census tract · Middlesex County

Census Tract 3172.02, Middlesex County, Massachusetts

Census Tract 3172.02, GEOID 25017317202, in Middlesex County, Massachusetts, entirely within Chelmsford. 4,219 residents in the ACS 2020-2024 5-year estimates (±997); the 2020 Census counted 3,426.

Residents, 2020-2024

4,219

±997 (90% margin)
2020 Census count: 3,426

Median household income

$190,938

±$48,745 (90% margin)
Middlesex County: $130,847

Median home value

$656,300

±$21,387 (90% margin)
Middlesex County: $727,800

Median gross rent

not published


Middlesex County: $2,201

Where is Census Tract 3172.02?

Census Tract 3172.02 is one of 357 census tracts in Middlesex County, Massachusetts. It covers 2.19 square miles of land, 1,562 residents per square mile in 2020. Its GEOID, 25017317202, names it uniquely (how tract numbers and GEOIDs work).

Places Census Tract 3172.02 lies in (share of its 2020 census blocks)
PlaceShare of the tract
Chelmsford100%
Census Tract 3172.02 (marked with a dot) in Middlesex County, Massachusetts. Boundaries: Census Bureau 2024.
3171.013172.013172.033173.01 3172.02 1 mi
Census Tract 3172.02 (shaded) and the tracts that border it, numbered. Boundaries: Census Bureau 2024 cartographic boundary file, 1:500,000.

4 census tracts border Census Tract 3172.02: Tract 3171.01 ($105,344), Tract 3172.01 ($182,153), Tract 3172.03 ($143,935) and Tract 3173.01 ($128,625). 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 3172.02?

The 2020-2024 American Community Survey puts Census Tract 3172.02's population at 4,219 (±997) in 1,328 households; the 2020 Census counted 3,426 residents and 1,246 housing units.

Counts, ACS 2020-2024 5-year estimates
MeasureTract 3172.02ChelmsfordMiddlesex CountyMassachusetts
Total population4,219±99736,4461,638,3657,044,056
Households1,328±19313,450634,2152,785,042
Average household size3.18±0.352.682.492.44
Housing units1,328±19313,942664,2673,030,406

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 3172.02?

The median resident of Census Tract 3172.02 is 38.7 years old; 28.2% are under 18 and 16.3% are 65 or older. The largest group is non-Hispanic white residents at 86.7%, then non-Hispanic Asian residents at 6.9%. 10.4% 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 3172.02ChelmsfordMiddlesex CountyMassachusetts
Median age38.7±4.941.638.940.0
Under 18 years28.2%±9.1 pts21.6%19.5%19.4%
65 years and over16.3%±4.3 pts18.1%16.3%17.9%
Hispanic or Latino (any race)0.5%±0.6 pts6.1%9.3%13.3%
White alone, not Hispanic86.7%±6.1 pts77.1%65.1%66.6%
Black or African American alone, not Hispanic0.0%±1.0 pts1.9%4.7%6.4%
Asian alone, not Hispanic6.9%±3.9 pts10.8%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 Hispanic2.9%±2.4 pts3.3%5.8%5.1%
Some other race alone, not Hispanic3.0%±4.1 pts0.5%1.4%1.2%
Born outside the United States10.4%±4.5 pts13.5%23.1%18.0%
Speak a language other than English at home (age 5+)13.0%±5.4 pts17.2%29.1%25.1%
Civilian veterans (age 18+)3.6%±2.0 pts4.6%3.3%4.3%
With a disability9.6%±4.0 pts11.2%9.9%12.3%
No health insurance coverage0.2%±0.4 pts1.2%2.4%2.6%
High school graduate or higher (age 25+)97.0%±2.3 pts93.8%93.2%91.4%
Bachelor's degree or higher (age 25+)71.0%±6.8 pts52.8%59.5%47.3%
Graduate or professional degree (age 25+)29.8%±6.3 pts24.3%30.5%21.8%
Lived in the same house a year earlier94.0%±4.9 pts91.7%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 3172.02 earn?

Half of the 1,328 households in Census Tract 3172.02 earn less than $190,938 a year (±$48,745), against $130,847 across Middlesex County: 52nd highest of the county's 350 tracts with a reliable estimate.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
MeasureTract 3172.02ChelmsfordMiddlesex CountyMassachusetts
Median household income$190,938±$48,745$140,629$130,847$103,960
Mean household income$221,200±$23,494$162,009$178,070$144,950
Per capita income$69,262±$12,143$60,022$69,556$57,897
People below the poverty line0.6%±0.8 pts4.7%7.7%10.0%
Children under 18 below the poverty line0.0%±3.5 pts3.2%7.9%11.7%
Households receiving SNAP2.3%±2.2 pts10.0%9.3%14.7%
Households with a computer97.4%±3.4 pts97.5%97.0%95.7%
Households with a broadband subscription96.5%±3.1 pts95.2%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 3172.02?

Owners occupy 97.9% of Census Tract 3172.02's occupied homes and renters 2.1%. The median owner-occupied home is valued at $656,300 by its owner (±$21,387).

Housing, ACS 2020-2024 5-year estimates
MeasureTract 3172.02ChelmsfordMiddlesex CountyMassachusetts
Median home value (owner-occupied)$656,300±$21,387$593,700$727,800$562,100
Renters paying 35% or more of income on rent67.9%±55.1 pts46.7%37.6%41.8%
Median monthly owner costs, with a mortgage$3,351±$328$2,983$3,224$2,726
Owner-occupied homes97.9%±2.3 pts82.1%61.3%62.5%
Renter-occupied homes2.1%±2.3 pts17.9%38.7%37.5%
Housing units1,328±19313,942664,2673,030,406
Single-family detached homes97.3%±2.1 pts66.7%46.5%51.1%
Mobile homes0.0%±3.1 pts1.9%0.4%0.8%
Built 2020 or later0.0%±3.1 pts0.6%1.2%1.0%
Built 2010 to 20191.4%±2.1 pts5.7%7.3%6.2%
Built 1939 or earlier17.0%±11.0 pts15.0%32.3%30.5%
Households with no vehicle0.5%±0.8 pts5.0%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 3172.02 get to work?

66.7% of Census Tract 3172.02's workers drive alone and 30.2% work from home. The average trip to work takes 28.3 minutes.

Work and commuting, ACS 2020-2024 5-year estimates
MeasureTract 3172.02ChelmsfordMiddlesex CountyMassachusetts
In the labor force (age 16+)68.7%±4.8 pts69.0%69.9%67.0%
Unemployment rate3.5%±3.2 pts5.3%4.4%5.2%
Drove alone to work66.7%±11.2 pts68.8%54.2%61.2%
Carpooled1.4%±1.9 pts4.2%6.3%7.0%
Public transportation0.0%±2.0 pts1.0%7.2%6.5%
Walked0.0%±2.0 pts1.5%4.2%4.1%
Worked from home30.2%±11.2 pts22.8%24.7%18.6%
Mean travel time to work28.3 min±4.328.0 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 3172.02 compare with the other tracts in Middlesex County?

Among Middlesex County's tracts with a reliable estimate, Census Tract 3172.02 ranks as shown below (1 = highest).

Census Tract 3172.02's rank among the tracts of Middlesex County
MeasureIn Middlesex County
Population199th of 354
Residents per square mile275th of 357
Median household income52nd of 350
Per capita income166th of 354
Median home value228th of 350
Bachelor's degree or higher123rd of 354
Median age207th of 354
Owner-occupied share8th of 351

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

Median household income, ACS 2020-2024 5-year estimates
TractRankMedian household incomeResidents
Tract 382249th$193,488±$37,531 · within the margin of this tract5,290
Tract 361250th$192,279±$37,686 · within the margin of this tract6,344
Tract 332151st$190,978±$16,990 · within the margin of this tract5,851
Tract 3172.0252nd$190,938±$48,7454,219
Tract 3311.0253rd$184,625±$42,043 · within the margin of this tract7,252
Tract 358454th$184,299±$10,951 · within the margin of this tract4,919
Tract 334155th$184,205±$21,383 · within the margin of this tract7,037

"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 3172.02?

3 of the 17 figures for Census Tract 3172.02 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