Census tract · Western Connecticut Planning Region
Census Tract 109, Western Connecticut Planning Region, Connecticut
Census Tract 109, GEOID 09190010900, in Western Connecticut Planning Region, Connecticut, entirely within Greenwich. 5,391 residents in the ACS 2020-2024 5-year estimates (±626); the 2020 Census counted 5,279.
Residents, 2020-2024
5,391
±626 (90% margin)
2020 Census count: 5,279
Median household income
$232,560
±$47,385 (90% margin)
Western Connecticut Planning Region: $128,188
Median home value
$1,230,400
±$152,416 (90% margin)
Western Connecticut Planning Region: $652,900
Median gross rent
$3,500 or more
The survey's top or bottom value; no margin is published
Western Connecticut Planning Region: $2,110
Where is Census Tract 109?
Census Tract 109 is one of 146 census tracts in Western Connecticut Planning Region, Connecticut. It covers 1.00 square miles of land, 5,268 residents per square mile in 2020. Its GEOID, 09190010900, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Greenwich | 100% |
| Riverside | 56% |
| Old Greenwich | 44% |
4 census tracts border Census Tract 109: Tract 102.02 ($224,242), Tract 110 ($250,000 or more), Tract 111 ($250,000 or more) and Tract 214.02 ($60,570). 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 109?
The 2020-2024 American Community Survey puts Census Tract 109's population at 5,391 (±626) in 1,842 households; the 2020 Census counted 5,279 residents and 1,994 housing units.
| Measure | Tract 109 | Greenwich |
|---|---|---|
| Total population | 5,391 ±626 | 63,856 |
| Households | 1,842 ±184 | 23,094 |
| Average household size | 2.92 ±0.23 | 2.74 |
| Housing units | 1,955 ±175 | 25,613 |
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 109?
The median resident of Census Tract 109 is 40.2 years old; 30.0% are under 18 and 15.1% are 65 or older. The largest group is non-Hispanic white residents at 54.8%, then non-Hispanic Asian residents at 19.8%. 30.7% of residents were born outside the United States.
| Measure | Tract 109 | Greenwich |
|---|---|---|
| Median age | 40.2 ±2.9 | 43.0 |
| Under 18 years | 30.0% ±4.4 pts | 25.7% |
| 65 years and over | 15.1% ±3.1 pts | 18.7% |
| Hispanic or Latino (any race) | 16.5% ±7.2 pts | 14.4% |
| White alone, not Hispanic | 54.8% ±8.5 pts | 68.5% |
| Black or African American alone, not Hispanic | 3.7% ±3.3 pts | 2.5% |
| Asian alone, not Hispanic | 19.8% ±6.3 pts | 7.0% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.8 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Two or more races, not Hispanic | 5.1% ±2.9 pts | 5.5% |
| Some other race alone, not Hispanic | 0.1% ±0.3 pts | 2.0% |
| Born outside the United States | 30.7% ±5.7 pts | 22.5% |
| Speak a language other than English at home (age 5+) | 35.7% ±6.7 pts | 25.1% |
| Civilian veterans (age 18+) | 1.0% ±0.9 pts | 2.4% |
| With a disability | 6.2% ±1.9 pts | 6.2% |
| No health insurance coverage | 2.3% ±1.4 pts | 4.4% |
| High school graduate or higher (age 25+) | 97.9% ±1.0 pts | 96.0% |
| Bachelor's degree or higher (age 25+) | 73.3% ±5.2 pts | 72.5% |
| Graduate or professional degree (age 25+) | 36.8% ±5.7 pts | 38.2% |
| Lived in the same house a year earlier | 83.0% ±4.4 pts | 88.2% |
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 109 earn?
Half of the 1,842 households in Census Tract 109 earn less than $232,560 a year (±$47,385), against $128,188 across Western Connecticut Planning Region: 31st highest of the county's 143 tracts with a reliable estimate. 5.0% of residents live below the poverty line.
| Measure | Tract 109 | Greenwich |
|---|---|---|
| Median household income | $232,560 ±$47,385 | $206,130 |
| Mean household income | $281,607 ±$28,565 | $376,402 |
| Per capita income | $99,005 ±$10,409 | $137,685 |
| People below the poverty line | 5.0% ±2.5 pts | 6.1% |
| Children under 18 below the poverty line | 1.9% ±1.7 pts | 7.1% |
| Households receiving SNAP | 1.6% ±1.4 pts | 3.4% |
| Households with a computer | 98.2% ±1.5 pts | 97.7% |
| Households with a broadband subscription | 96.9% ±2.5 pts | 96.1% |
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 109?
Owners occupy 72.9% of Census Tract 109's occupied homes and renters 27.1%. The median owner-occupied home is valued at $1,230,400 by its owner (±$152,416). The median renter pays $3,500 or more a month including utilities, and 30.5% of renters pay 35% or more of their income on rent.
| Measure | Tract 109 | Greenwich |
|---|---|---|
| Median home value (owner-occupied) | $1,230,400 ±$152,416 | $1,695,700 |
| Median gross rent | $3,500 or more | $2,674 |
| Renters paying 35% or more of income on rent | 30.5% ±15.8 pts | 46.3% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 72.9% ±7.2 pts | 70.0% |
| Renter-occupied homes | 27.1% ±7.2 pts | 30.0% |
| Housing units | 1,955 ±175 | 25,613 |
| Single-family detached homes | 76.0% ±5.8 pts | 63.7% |
| Mobile homes | 0.0% ±2.1 pts | 0.0% |
| Built 2020 or later | 2.1% ±2.3 pts | 1.0% |
| Built 2010 to 2019 | 3.1% ±2.0 pts | 5.5% |
| Built 1939 or earlier | 6.0% ±3.9 pts | 25.6% |
| Households with no vehicle | 1.8% ±2.1 pts | 4.0% |
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 109 get to work?
44.0% of Census Tract 109's workers drive alone and 34.4% work from home. The average trip to work takes 34.1 minutes. The unemployment rate in 2020-2024 averaged 8.0%.
| Measure | Tract 109 | Greenwich |
|---|---|---|
| In the labor force (age 16+) | 67.0% ±4.7 pts | 63.2% |
| Unemployment rate | 8.0% ±3.3 pts | 6.0% |
| Drove alone to work | 44.0% ±8.7 pts | 50.3% |
| Carpooled | 6.5% ±3.7 pts | 5.0% |
| Public transportation | 12.3% ±4.9 pts | 12.3% |
| Walked | 0.5% ±0.6 pts | 2.8% |
| Worked from home | 34.4% ±8.6 pts | 27.9% |
| Mean travel time to work | 34.1 min ±5.2 | 29.6 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 109 compare with the other tracts in Western Connecticut Planning Region?
Among Western Connecticut Planning Region's tracts with a reliable estimate, Census Tract 109 ranks as shown below (1 = highest).
| Measure | In Western Connecticut Planning Region |
|---|---|
| Population | 34th of 145 |
| Residents per square mile | 44th of 145 |
| Median household income | 31st of 143 |
| Per capita income | 43rd of 145 |
| Median home value | 23rd of 144 |
| Median gross rent | 1st of 128 |
| Poverty rate | 50th of 65 |
| Bachelor's degree or higher | 41st of 144 |
| Median age | 95th of 145 |
| Owner-occupied share | 81st of 143 |
The tracts next to it on Western Connecticut Planning Region's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 202 | 28th | $235,375±$48,068 · within the margin of this tract |
| Tract 351.02 | 29th | $235,227±$75,545 · within the margin of this tract |
| Tract 451.02 | 30th | $233,656±$38,182 · within the margin of this tract |
| Tract 109 | 31st | $232,560±$47,385 |
| Tract 551 | 32nd | $225,966±$36,817 · within the margin of this tract |
| Tract 102.02 | 33rd | $224,242±$48,853 · within the margin of this tract |
| Tract 504 | 34th | $214,426±$46,008 · within the margin of this tract |
"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 109?
1 of the 18 figures for Census Tract 109 on this page carries a coefficient of variation over 40% and is 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