Census tract · Middlesex County
Census Tract 3690, Middlesex County, Massachusetts
Census Tract 3690, GEOID 25017369000, in Middlesex County, Massachusetts, entirely within Waltham. 3,720 residents in the ACS 2020-2024 5-year estimates (±55); the 2020 Census counted 3,300.
Residents, 2020-2024
3,720
±55 (90% margin)
2020 Census count: 3,300
Median household income
not published
Middlesex County: $130,847
Median home value
$488,900
±$211,174 (90% margin)
Middlesex County: $727,800
Median gross rent
not published
Middlesex County: $2,201
Where is Census Tract 3690?
Census Tract 3690 is one of 357 census tracts in Middlesex County, Massachusetts. It covers 1.20 square miles of land, 2,745 residents per square mile in 2020. Its GEOID, 25017369000, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Waltham | 100% |
5 census tracts border Census Tract 3690: Tract 3577 ($138,958), Tract 3583 ($250,000 or more), Tract 3689.01 ($129,236), Tract 3689.02 ($58,887) and Tract 3691 ($133,824). 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 3690?
The 2020-2024 American Community Survey puts Census Tract 3690's population at 3,720 (±55) in 36 households; the 2020 Census counted 3,300 residents and 38 housing units.
| Measure | Tract 3690 | Waltham |
|---|---|---|
| Total population | 3,720±55 | 64,902 |
| Households | 36±28 | 25,498 |
| Average household size | 1.53±0.58 | 2.23 |
| Housing units | 36±28 | 26,728 |
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 3690?
The median resident of Census Tract 3690 is 20.2 years old. The largest group is non-Hispanic white residents at 59.5%, then non-Hispanic Asian residents at 15.3%. 11.6% of residents were born outside the United States.
| Measure | Tract 3690 | Waltham |
|---|---|---|
| Median age | 20.2±0.4 | 34.4 |
| Under 18 years | 0.6%±0.8 pts | 13.6% |
| 65 years and over | 1.9%±1.6 pts | 15.8% |
| Hispanic or Latino (any race) | 10.9%±3.2 pts | 15.9% |
| White alone, not Hispanic | 59.5%±5.8 pts | 57.6% |
| Black or African American alone, not Hispanic | 6.9%±3.0 pts | 8.3% |
| Asian alone, not Hispanic | 15.3%±3.4 pts | 12.6% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.1 pts | 0.3% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 1.1%±1.2 pts | 0.1% |
| Two or more races, not Hispanic | 6.0%±2.6 pts | 4.3% |
| Some other race alone, not Hispanic | 0.3%±0.5 pts | 0.9% |
| Born outside the United States | 11.6%±3.4 pts | 26.3% |
| Speak a language other than English at home (age 5+) | 32.1%±4.9 pts | 32.3% |
| Civilian veterans (age 18+) | 0.1%±0.3 pts | 2.6% |
| With a disability | 9.6%±2.5 pts | 10.7% |
| No health insurance coverage | 2.5%±1.4 pts | 2.9% |
| High school graduate or higher (age 25+) | 84.3%±14.5 pts | 93.3% |
| Bachelor's degree or higher (age 25+) | 60.8%±23.0 pts | 57.3% |
| Graduate or professional degree (age 25+) | 22.2%±11.7 pts | 27.9% |
| Lived in the same house a year earlier | 68.9%±6.5 pts | 83.0% |
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 3690 earn?
The median household income for Census Tract 3690 is not published: too few households were sampled. 57.8% of residents live below the poverty line.
| Measure | Tract 3690 | Waltham |
|---|---|---|
| Mean household income | $241,381±$155,996 | $145,664 |
| Per capita income | $14,019±$4,491 | $58,449 |
| People below the poverty line | 57.8%±21.1 pts | 9.4% |
| Households receiving SNAP | 0.0%±56.5 pts | 7.0% |
| Households with a computer | 100.0%±56.5 pts | 95.6% |
| Households with a broadband subscription | 100.0%±56.5 pts | 94.0% |
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 3690?
Owners occupy 88.9% of Census Tract 3690's occupied homes and renters 11.1%. The median owner-occupied home is valued at $488,900 by its owner (±$211,174).
| Measure | Tract 3690 | Waltham |
|---|---|---|
| Median home value (owner-occupied) | $488,900±$211,174 | $748,700 |
| Median monthly owner costs, with a mortgage | $2,348±$1,199 | $3,076 |
| Owner-occupied homes | 88.9%±18.5 pts | 49.7% |
| Renter-occupied homes | 11.1%±18.5 pts | 50.3% |
| Housing units | 36±28 | 26,728 |
| Single-family detached homes | 50.0%±49.7 pts | 37.0% |
| Mobile homes | 0.0%±56.5 pts | 0.2% |
| Built 2020 or later | 0.0%±56.5 pts | 1.1% |
| Built 2010 to 2019 | 25.0%±36.1 pts | 6.4% |
| Built 1939 or earlier | 13.9%±25.3 pts | 28.3% |
| Households with no vehicle | 0.0%±56.5 pts | 8.6% |
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 3690 get to work?
20.4% of Census Tract 3690's workers drive alone and 24.2% work from home. The average trip to work takes 16.6 minutes. The unemployment rate in 2020-2024 averaged 6.1%.
| Measure | Tract 3690 | Waltham |
|---|---|---|
| In the labor force (age 16+) | 44.2%±5.2 pts | 68.5% |
| Unemployment rate | 6.1%±2.9 pts | 3.7% |
| Drove alone to work | 20.4%±5.3 pts | 53.0% |
| Carpooled | 3.4%±3.1 pts | 9.5% |
| Public transportation | 4.6%±3.6 pts | 4.5% |
| Walked | 45.6%±9.3 pts | 6.2% |
| Worked from home | 24.2%±8.0 pts | 24.2% |
| Mean travel time to work | 16.6 min±3.4 | 24.7 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 3690 compare with the other tracts in Middlesex County?
Among Middlesex County's tracts with a reliable estimate, Census Tract 3690 ranks as shown below (1 = highest).
| Measure | In Middlesex County | In Waltham |
|---|---|---|
| Population | 240th of 354 | 10th of 13 |
| Residents per square mile | 230th of 357 | 12th of 13 |
| Per capita income | 354th of 354 | 13th of 13 |
| Median home value | 312th of 350 | 13th of 13 |
| Poverty rate | 1st of 223 | 1st of 9 |
| Bachelor's degree or higher | 183rd of 354 | 4th of 13 |
| Median age | 354th of 354 | 13th of 13 |
| Owner-occupied share | 50th of 351 | 1st of 13 |
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 3690?
2 of the 16 figures for Census Tract 3690 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