Census tract · Suffolk County
Census Tract 1121.03, Suffolk County, New York
Census Tract 1121.03, GEOID 36103112103, in Suffolk County, New York, entirely within Commack and Huntington (town). 5,087 residents in the ACS 2020-2024 5-year estimates (±1,291); the 2020 Census counted 4,564.
Residents, 2020-2024
5,087
±1,291 (90% margin)
2020 Census count: 4,564
Median household income
$146,875
±$22,006 (90% margin)
Suffolk County: $130,686
Median home value
$626,400
±$19,932 (90% margin)
Suffolk County: $578,400
Median gross rent
$2,725
±$214 (90% margin)
Suffolk County: $2,255
Where is Census Tract 1121.03?
Census Tract 1121.03 is one of 371 census tracts in Suffolk County, New York. It covers 1.44 square miles of land, 3,165 residents per square mile in 2020. Its GEOID, 36103112103, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Commack | 100% |
| Huntington (town) | 100% |
6 census tracts border Census Tract 1121.03: Tract 1118.01 ($173,333), Tract 1118.04 ($181,940), Tract 1121.02 ($250,000 or more), Tract 1121.04 ($213,684), Tract 1122.11 ($196,034) and Tract 1352.05 ($160,552). 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 1121.03?
The 2020-2024 American Community Survey puts Census Tract 1121.03's population at 5,087 (±1,291) in 1,543 households; the 2020 Census counted 4,564 residents and 1,551 housing units.
| Measure | Tract 1121.03 | Commack |
|---|---|---|
| Total population | 5,087 ±1,291 | 36,558 |
| Households | 1,543 ±199 | 11,640 |
| Average household size | 3.05 ±0.55 | 3.06 |
| Housing units | 1,595 ±191 | 11,878 |
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 1121.03?
The median resident of Census Tract 1121.03 is 45.1 years old; 22.2% are under 18 and 23.2% are 65 or older. The largest group is non-Hispanic white residents at 85.6%, then non-Hispanic Asian residents at 8.2%. 9.7% of residents were born outside the United States.
| Measure | Tract 1121.03 | Commack |
|---|---|---|
| Median age | 45.1 ±6.3 | 42.3 |
| Under 18 years | 22.2% ±7.3 pts | 23.0% |
| 65 years and over | 23.2% ±6.5 pts | 16.9% |
| Hispanic or Latino (any race) | 0.9% ±0.9 pts | 9.5% |
| White alone, not Hispanic | 85.6% ±6.3 pts | 78.6% |
| Black or African American alone, not Hispanic | 0.7% ±0.7 pts | 1.9% |
| Asian alone, not Hispanic | 8.2% ±3.6 pts | 6.9% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.8 pts | 0.0% |
| Two or more races, not Hispanic | 4.6% ±3.8 pts | 2.6% |
| Some other race alone, not Hispanic | 0.0% ±0.8 pts | 0.5% |
| Born outside the United States | 9.7% ±4.4 pts | 10.5% |
| Speak a language other than English at home (age 5+) | 11.8% ±4.9 pts | 14.4% |
| Civilian veterans (age 18+) | 3.4% ±1.7 pts | 4.0% |
| With a disability | 6.5% ±2.7 pts | 8.1% |
| No health insurance coverage | 4.8% ±4.7 pts | 2.1% |
| High school graduate or higher (age 25+) | 95.5% ±2.2 pts | 96.7% |
| Bachelor's degree or higher (age 25+) | 52.9% ±6.1 pts | 60.0% |
| Graduate or professional degree (age 25+) | 27.3% ±4.5 pts | 28.8% |
| Lived in the same house a year earlier | 77.9% ±16.4 pts | 93.7% |
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 Census Tract 1121.03 earn?
Half of the 1,543 households in Census Tract 1121.03 earn less than $146,875 a year (±$22,006), against $130,686 across Suffolk County: 127th highest of the county's 366 tracts with a reliable estimate.
| Measure | Tract 1121.03 | Commack |
|---|---|---|
| Median household income | $146,875 ±$22,006 | $169,792 |
| Mean household income | $185,503 ±$34,456 | $203,185 |
| Per capita income | $60,234 ±$14,584 | $66,299 |
| People below the poverty line | 1.1% ±0.9 pts | 4.2% |
| Children under 18 below the poverty line | 0.0% ±3.7 pts | 4.6% |
| Households receiving SNAP | 5.4% ±3.3 pts | 2.7% |
| Households with a computer | 98.6% ±1.4 pts | 98.5% |
| Households with a broadband subscription | 95.7% ±2.5 pts | 97.1% |
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 1121.03?
Owners occupy 90.6% of Census Tract 1121.03's occupied homes and renters 9.4%. The median owner-occupied home is valued at $626,400 by its owner (±$19,932). The median renter pays $2,725 a month including utilities, and 54.4% of renters pay 35% or more of their income on rent.
| Measure | Tract 1121.03 | Commack |
|---|---|---|
| Median home value (owner-occupied) | $626,400 ±$19,932 | $678,200 |
| Median gross rent | $2,725 ±$214 | $2,665 |
| Renters paying 35% or more of income on rent | 54.4% ±30.9 pts | 54.9% |
| Median monthly owner costs, with a mortgage | $3,293 ±$101 | $3,856 |
| Owner-occupied homes | 90.6% ±4.4 pts | 93.7% |
| Renter-occupied homes | 9.4% ±4.4 pts | 6.3% |
| Housing units | 1,595 ±191 | 11,878 |
| Single-family detached homes | 94.5% ±3.2 pts | 93.3% |
| Mobile homes | 0.0% ±2.6 pts | 0.2% |
| Built 2020 or later | 0.6% ±0.9 pts | 0.3% |
| Built 2010 to 2019 | 1.6% ±1.7 pts | 0.7% |
| Built 1939 or earlier | 1.2% ±1.3 pts | 1.1% |
| Households with no vehicle | 10.4% ±4.7 pts | 3.3% |
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 1121.03 get to work?
57.4% of Census Tract 1121.03's workers drive alone and 31.4% work from home. The average trip to work takes 36.8 minutes.
| Measure | Tract 1121.03 | Commack |
|---|---|---|
| In the labor force (age 16+) | 57.7% ±5.1 pts | 66.5% |
| Unemployment rate | 0.4% ±0.6 pts | 4.6% |
| Drove alone to work | 57.4% ±8.0 pts | 69.6% |
| Carpooled | 5.7% ±4.8 pts | 5.3% |
| Public transportation | 3.3% ±2.5 pts | 4.8% |
| Walked | 2.2% ±2.0 pts | 0.7% |
| Worked from home | 31.4% ±7.4 pts | 19.1% |
| Mean travel time to work | 36.8 min ±7.9 | 33.1 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 1121.03 compare with the other tracts in Suffolk County?
Among Suffolk County's tracts with a reliable estimate, Census Tract 1121.03 ranks as shown below (1 = highest).
| Measure | In Suffolk County | In Commack |
|---|---|---|
| Population | 88th of 370 | 2nd of 10 |
| Residents per square mile | 167th of 370 | 6th of 10 |
| Median household income | 127th of 366 | 9th of 10 |
| Per capita income | 152nd of 370 | 9th of 10 |
| Median home value | 134th of 364 | 10th of 10 |
| Median gross rent | 63rd of 278 | 3rd of 5 |
| Bachelor's degree or higher | 102nd of 370 | 9th of 10 |
| Median age | 144th of 370 | 3rd of 10 |
| Owner-occupied share | 130th of 368 | 8th of 10 |
The tracts next to it on Suffolk County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 1466.08 | 124th | $147,500±$50,270 · within the margin of this tract |
| Tract 1464.02 | 125th | $147,411±$26,577 · within the margin of this tract |
| Tract 1582.05 | 126th | $147,308±$60,167 · within the margin of this tract |
| Tract 1121.03 | 127th | $146,875±$22,006 |
| Tract 1231.02 | 128th | $146,806±$16,162 · within the margin of this tract |
| Tract 1112.01 | 129th | $146,270±$15,817 · within the margin of this tract |
| Tract 1593 | 130th | $146,083±$30,909 · 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 1121.03?
3 of the 18 figures for Census Tract 1121.03 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