Census-designated place · Connecticut
Old Greenwich, Connecticut
Old Greenwich, census-designated place, in Western Connecticut Planning Region, Connecticut. Old Greenwich had 6,936 people in the ACS 2020-2024 5-year estimates (±663). GEOID 0956900.
Residents, 2020-2024
6,936
±663 (90% margin)
2020 Census count: 6,962
Median household income
$250,000 or more
The survey's top or bottom value; no margin is published
Connecticut: $95,781
Median home value
$1,844,700
±$189,542 (90% margin)
Connecticut: $366,900
Median gross rent
$3,500 or more
The survey's top or bottom value; no margin is published
Connecticut: $1,488
Where is Old Greenwich and what county is it in?
Old Greenwich is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Western Connecticut Planning Region, Connecticut. It covers 2.0 square miles of land, 3,490 residents per square mile in 2020.
Old Greenwich is in the Bridgeport-Stamford-Danbury, CT metropolitan statistical area, which takes in 2 counties (Census Bureau delineation, July 2023).
Old Greenwich lies entirely within Greenwich, 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 Old Greenwich, and is it growing?
The 2020-2024 American Community Survey puts Old Greenwich's population at 6,936 (±663). The 2020 Census counted 6,962 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; Old Greenwich is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Old Greenwich | Western Connecticut Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Total population | 6,936 ±663 | 627,071 | no clear change |
| Households | 2,385 ±212 | 235,379 | no clear change |
| Average household size | 2.90 ±0.16 | 2.63 | −0.23 |
| Housing units | 2,542 ±222 | 251,530 | no clear change |
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 Old Greenwich?
The median resident of Old Greenwich is 40.5 years old; 32.8% are under 18 and 14.5% are 65 or older. The largest group is non-Hispanic white residents at 76.5%, then non-Hispanic Asian residents at 9.2%. 19.2% of residents were born outside the United States.
| Measure | Old Greenwich | Western Connecticut Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median age | 40.5 ±1.2 | 41.5 | no clear change |
| Under 18 years | 32.8% ±2.9 pts | 21.8% | – |
| 65 years and over | 14.5% ±2.6 pts | 17.4% | – |
| Male | 50.7% ±3.6 pts | 49.1% | – |
| Hispanic or Latino (any race) | 7.2% ±3.1 pts | 20.5% | no clear change |
| White alone, not Hispanic | 76.5% ±6.1 pts | 58.6% | no clear change |
| Black or African American alone, not Hispanic | 0.5% ±0.5 pts | 9.3% | – |
| Asian alone, not Hispanic | 9.2% ±3.2 pts | 5.4% | +4.3 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.6 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.6 pts | 0.0% | – |
| Two or more races, not Hispanic | 6.4% ±3.6 pts | 4.8% | – |
| Some other race alone, not Hispanic | 0.2% ±0.3 pts | 1.2% | – |
| Born outside the United States | 19.2% ±4.1 pts | 23.8% | no clear change |
| Speak a language other than English at home (age 5+) | 20.3% ±5.1 pts | 29.7% | – |
| Civilian veterans (age 18+) | 2.2% ±1.1 pts | 3.1% | – |
| With a disability | 5.0% ±1.8 pts | 9.5% | – |
| No health insurance coverage | 2.3% ±1.4 pts | 7.2% | no clear change |
| High school graduate or higher (age 25+) | 99.0% ±0.7 pts | 91.7% | – |
| Bachelor's degree or higher (age 25+) | 85.4% ±3.6 pts | 55.5% | no clear change |
| Graduate or professional degree (age 25+) | 39.5% ±5.2 pts | 25.4% | – |
| Lived in the same house a year earlier | 88.5% ±3.7 pts | 89.2% | – |
| Moved from another state in the past year | 3.8% ±2.6 pts | 3.4% | – |
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 Old Greenwich earn?
Half of Old Greenwich's 2,385 households earn less than $250,000 or more a year (), against $128,188 in Western Connecticut Planning Region and $95,781 in Connecticut. In 2015-2019 it was $250,000 or more in 2024 dollars; the margins of error cannot tell the two periods apart. 3.6% of residents live below the poverty line.
| Measure | Old Greenwich | Western Connecticut Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $250,000 or more | $128,188 | no clear change |
| Mean household income | $415,317 ±$57,234 | $214,668 | – |
| Per capita income | $143,881 ±$16,641 | $82,266 | no clear change |
| People below the poverty line | 3.6% ±1.6 pts | 7.5% | no clear change |
| Children under 18 below the poverty line | 1.7% ±1.8 pts | 9.1% | – |
| Households receiving SNAP | 0.8% ±0.9 pts | 7.0% | – |
| Households with a computer | 99.1% ±0.8 pts | 96.6% | – |
| Households with a broadband subscription | 97.4% ±1.9 pts | 94.7% | – |
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 Old Greenwich?
Owners occupy 86.3% of Old Greenwich's occupied homes and renters 13.7%. The median owner-occupied home is valued at $1,844,700 by its owner (±$189,542). The median renter pays $3,500 or more a month including utilities, and 47.2% of renters pay 35% or more of their income on rent.
| Measure | Old Greenwich | Western Connecticut Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $1,844,700 ±$189,542 | $652,900 | no clear change |
| Median gross rent | $3,500 or more | $2,110 | +$883 |
| Renters paying 35% or more of income on rent | 47.2% ±19.6 pts | 43.4% | no clear change |
| Median monthly owner costs, with a mortgage | $4,000 or more | $3,494 | – |
| Owner-occupied homes | 86.3% ±3.9 pts | 66.4% | no clear change |
| Renter-occupied homes | 13.7% ±3.9 pts | 33.6% | – |
| Housing units | 2,542 ±222 | 251,530 | no clear change |
| Homeowner vacancy rate | 1.4% ±2.2 pts | 1.1% | – |
| Rental vacancy rate | 9.9% ±14.9 pts | 3.8% | – |
| Single-family detached homes | 82.2% ±5.3 pts | 57.3% | – |
| Mobile homes | 0.0% ±1.7 pts | 0.4% | – |
| Built 2020 or later | 0.7% ±0.8 pts | 1.0% | – |
| Built 2010 to 2019 | 7.1% ±2.6 pts | 8.2% | – |
| Built 1939 or earlier | 26.1% ±5.1 pts | 16.3% | – |
| Households with no vehicle | 1.2% ±1.3 pts | 6.2% | – |
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 Old Greenwich work and get to work?
38.2% of Old Greenwich's workers drive alone and 36.3% work from home. The average trip to work takes 34.7 minutes. The unemployment rate in 2020-2024 averaged 4.6%.
| Measure | Old Greenwich | Western Connecticut Planning Region | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 64.0% ±4.1 pts | 68.3% | – |
| Unemployment rate | 4.6% ±2.6 pts | 5.3% | – |
| Drove alone to work | 38.2% ±7.8 pts | 59.3% | – |
| Carpooled | 4.4% ±3.1 pts | 8.1% | – |
| Public transportation | 16.9% ±4.6 pts | 7.0% | – |
| Walked | 1.8% ±1.3 pts | 2.5% | – |
| Worked from home | 36.3% ±8.2 pts | 21.5% | +27.6 pts |
| Mean travel time to work | 34.7 min ±4.8 | 30.8 min | no clear change |
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 Old Greenwich?
1 census tract lies mostly in Old Greenwich, and 1 more reaches into it (2020 census blocks).
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 Old Greenwich) · Census block assignment files
How does Old Greenwich compare with other places in Connecticut?
Old Greenwich ranks 1st 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) | 143rd | 303 |
| Residents per square mile | 26th | 303 |
| Median household income | 1st | 294 |
| Per capita income | 5th | 303 |
| Median home value | 3rd | 300 |
| Median gross rent | 1st | 266 |
| Poverty rate | 173rd | 202 |
| Bachelor's degree or higher | 5th | 297 |
| Median age | 236th | 301 |
| Owner-occupied share | 93rd | 300 |
| Work from home | 18th | 279 |
| Travel time to work | 37th | 302 |
Old Greenwich's figures with every place in Connecticut (CSV)
Every place in Connecticut, sortable · Compare Old Greenwich 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 Old Greenwich?
14 of the 57 figures for Old Greenwich 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 Old Greenwich 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.