Census-designated place · Connecticut
Mill Plain, Connecticut
Mill Plain, census-designated place, in Greater Bridgeport Planning Region, Connecticut. Mill Plain had 1,654 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 2,033 (±524). GEOID 0947990.
Residents, 2020 Census
1,654
Census count or controlled total
ACS 2020-2024 estimate: 2,033 ±524
Median household income
$200,380
±$29,387 (90% margin)
Connecticut: $95,781
Median home value
$818,900
±$123,885 (90% margin)
Connecticut: $366,900
Median gross rent
not published
Connecticut: $1,488
Where is Mill Plain and what county is it in?
Mill Plain is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Greater Bridgeport Planning Region, Connecticut. It covers 0.5 square miles of land, 3,396 residents per square mile in 2020.
Mill Plain is in the Bridgeport-Stamford-Danbury, CT metropolitan statistical area, which takes in 2 counties (Census Bureau delineation, July 2023).
Mill Plain lies entirely within Fairfield, a town with its own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Mill Plain, and is it growing?
The 2020 Census counted 1,654 residents in Mill Plain, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 2,033 (±524).
The Census Bureau publishes yearly population estimates for incorporated places only; Mill Plain is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Mill Plain | Greater Bridgeport Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Total population | 2,033 ±524 | 329,259 | – |
| Households | 685 ±180 | 119,633 | – |
| Average household size | 2.97 ±0.32 | 2.67 | – |
| Housing units | 702 ±180 | 126,039 | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Mill Plain?
The median resident of Mill Plain is 43.8 years old; 27.5% are under 18 and 15.5% are 65 or older. The largest group is non-Hispanic white residents at 91.4%, then Hispanic or Latino residents (of any race) at 6.1%.
| Measure | Mill Plain | Greater Bridgeport Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median age | 43.8 ±5.7 | 39.8 | – |
| Under 18 years | 27.5% ±5.9 pts | 22.1% | – |
| 65 years and over | 15.5% ±6.0 pts | 16.0% | – |
| Male | 55.3% ±3.6 pts | 49.0% | – |
| Hispanic or Latino (any race) | 6.1% ±4.0 pts | 26.7% | – |
| White alone, not Hispanic | 91.4% ±5.2 pts | 51.9% | – |
| Black or African American alone, not Hispanic | 0.0% ±2.1 pts | 11.3% | – |
| Asian alone, not Hispanic | 0.6% ±0.9 pts | 5.1% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±2.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±2.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.8% ±2.9 pts | 3.5% | – |
| Some other race alone, not Hispanic | 0.0% ±2.1 pts | 1.5% | – |
| Born outside the United States | 2.9% ±2.0 pts | 22.5% | – |
| Speak a language other than English at home (age 5+) | 6.6% ±3.8 pts | 34.1% | – |
| Civilian veterans (age 18+) | 4.7% ±3.6 pts | 3.0% | – |
| With a disability | 5.8% ±3.4 pts | 12.5% | – |
| No health insurance coverage | 1.4% ±1.4 pts | 8.6% | – |
| High school graduate or higher (age 25+) | 98.7% ±1.6 pts | 87.2% | – |
| Bachelor's degree or higher (age 25+) | 71.8% ±17.0 pts | 41.7% | – |
| Graduate or professional degree (age 25+) | 43.8% ±12.4 pts | 18.0% | – |
| Lived in the same house a year earlier | 93.1% ±5.5 pts | 89.3% | – |
| Moved from another state in the past year | 1.3% ±1.1 pts | 2.7% | – |
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 Mill Plain earn?
Half of Mill Plain's 685 households earn less than $200,380 a year (±$29,387), against $89,667 in Greater Bridgeport Planning Region and $95,781 in Connecticut.
| Measure | Mill Plain | Greater Bridgeport Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $200,380 ±$29,387 | $89,667 | – |
| Mean household income | $253,959 ±$42,469 | $139,116 | – |
| Per capita income | $89,499 ±$16,652 | $52,385 | – |
| People below the poverty line | 6.1% ±6.2 pts | 12.4% | – |
| Children under 18 below the poverty line | 8.0% ±10.9 pts | 17.0% | – |
| Households receiving SNAP | 1.3% ±2.0 pts | 14.2% | – |
| Households with a computer | 100.0% ±6.0 pts | 94.9% | – |
| Households with a broadband subscription | 95.2% ±5.5 pts | 91.2% | – |
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 Mill Plain?
Owners occupy 94.5% of Mill Plain's occupied homes and renters 5.5%. The median owner-occupied home is valued at $818,900 by its owner (±$123,885).
| Measure | Mill Plain | Greater Bridgeport Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $818,900 ±$123,885 | $428,800 | – |
| Renters paying 35% or more of income on rent | 0.0% ±55.0 pts | 49.7% | – |
| Median monthly owner costs, with a mortgage | $3,217 ±$932 | $2,832 | – |
| Owner-occupied homes | 94.5% ±7.2 pts | 65.3% | – |
| Renter-occupied homes | 5.5% ±7.2 pts | 34.7% | – |
| Housing units | 702 ±180 | 126,039 | – |
| Homeowner vacancy rate | 0.0% ±6.4 pts | 1.0% | – |
| Rental vacancy rate | 30.9% ±48.6 pts | 4.2% | – |
| Single-family detached homes | 100.0% ±5.9 pts | 53.5% | – |
| Mobile homes | 0.0% ±5.9 pts | 0.2% | – |
| Built 2020 or later | 0.0% ±5.9 pts | 0.8% | – |
| Built 2010 to 2019 | 4.3% ±4.6 pts | 3.4% | – |
| Built 1939 or earlier | 14.1% ±6.1 pts | 23.9% | – |
| Households with no vehicle | 0.0% ±6.0 pts | 11.2% | – |
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 Mill Plain work and get to work?
72.7% of Mill Plain's workers drive alone and 15.0% work from home. The average trip to work takes 29.0 minutes.
| Measure | Mill Plain | Greater Bridgeport Planning Region | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 71.3% ±9.2 pts | 66.6% | – |
| Unemployment rate | 15.9% ±11.5 pts | 7.3% | – |
| Drove alone to work | 72.7% ±11.1 pts | 64.1% | – |
| Carpooled | 2.3% ±2.7 pts | 10.6% | – |
| Public transportation | 8.6% ±7.3 pts | 5.7% | – |
| Walked | 1.4% ±2.2 pts | 2.5% | – |
| Worked from home | 15.0% ±8.6 pts | 15.1% | – |
| Mean travel time to work | 29.0 min ±8.2 | 31.3 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
What census tracts are in Mill Plain?
No census tract lies mostly in Mill Plain; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 607Greater Bridgeport Planning Region | 8,526 | $189,495 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Mill Plain) · Census block assignment files
How does Mill Plain compare with other places in Connecticut?
Mill Plain ranks 26th of 294 places in Connecticut with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 250th | 303 |
| Residents per square mile | 27th | 303 |
| Median household income | 26th | 294 |
| Per capita income | 44th | 303 |
| Median home value | 34th | 300 |
| Bachelor's degree or higher | 37th | 297 |
| Median age | 172nd | 301 |
| Owner-occupied share | 19th | 300 |
| Work from home | 173rd | 279 |
| Travel time to work | 114th | 302 |
Mill Plain's figures with every place in Connecticut (CSV)
Every place in Connecticut, sortable · Compare Mill Plain with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Mill Plain?
25 of the 56 figures for Mill Plain 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.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. 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 · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Mill Plain are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.