Census tract · Nassau County
Census Tract 4127, Nassau County, New York
Census Tract 4127, GEOID 36059412700, in Nassau County, New York, entirely within Rockville Centre and Hempstead (town). 4,350 residents in the ACS 2020-2024 5-year estimates (±526); the 2020 Census counted 4,129.
Residents, 2020-2024
4,350
±526 (90% margin)
2020 Census count: 4,129
Median household income
$240,642
±$20,942 (90% margin)
Nassau County: $146,202
Median home value
$865,900
±$21,339 (90% margin)
Nassau County: $684,700
Median gross rent
not published
Nassau County: $2,252
Where is Census Tract 4127?
Census Tract 4127 is one of 286 census tracts in Nassau County, New York. It covers 0.49 square miles of land, 8,392 residents per square mile in 2020. Its GEOID, 36059412700, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Rockville Centre | 100% |
| Hempstead (town) | 100% |
7 census tracts border Census Tract 4127: Tract 4124 ($106,652), Tract 4125 ($209,583), Tract 4126 ($250,000 or more), Tract 4128 ($156,023), Tract 4129 ($156,900), Tract 4135 ($142,349) and Tract 4136 ($125,598). 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 4127?
The 2020-2024 American Community Survey puts Census Tract 4127's population at 4,350 (±526) in 1,381 households; the 2020 Census counted 4,129 residents and 1,354 housing units.
| Measure | Tract 4127 | Rockville Centre |
|---|---|---|
| Total population | 4,350±526 | 25,765 |
| Households | 1,381±164 | 9,913 |
| Average household size | 3.15±0.16 | 2.55 |
| Housing units | 1,399±162 | 10,332 |
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 4127?
The median resident of Census Tract 4127 is 42.0 years old; 30.0% are under 18 and 17.3% are 65 or older. The largest group is non-Hispanic white residents at 77.4%, then non-Hispanic Asian residents at 8.6%. 7.7% of residents were born outside the United States.
| Measure | Tract 4127 | Rockville Centre |
|---|---|---|
| Median age | 42.0±1.5 | 42.9 |
| Under 18 years | 30.0%±2.8 pts | 23.2% |
| 65 years and over | 17.3%±4.4 pts | 20.1% |
| Hispanic or Latino (any race) | 5.3%±3.4 pts | 9.6% |
| White alone, not Hispanic | 77.4%±11.8 pts | 77.0% |
| Black or African American alone, not Hispanic | 5.7%±5.8 pts | 4.9% |
| Asian alone, not Hispanic | 8.6%±9.8 pts | 5.6% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.0 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.0 pts | 0.0% |
| Two or more races, not Hispanic | 2.5%±3.1 pts | 2.0% |
| Some other race alone, not Hispanic | 0.5%±0.7 pts | 0.9% |
| Born outside the United States | 7.7%±4.6 pts | 9.9% |
| Speak a language other than English at home (age 5+) | 11.2%±7.1 pts | 13.1% |
| Civilian veterans (age 18+) | 6.4%±3.4 pts | 5.6% |
| With a disability | 3.8%±2.1 pts | 10.5% |
| No health insurance coverage | 0.1%±0.3 pts | 1.1% |
| High school graduate or higher (age 25+) | 97.1%±2.0 pts | 96.2% |
| Bachelor's degree or higher (age 25+) | 75.8%±7.0 pts | 63.9% |
| Graduate or professional degree (age 25+) | 42.2%±7.0 pts | 32.2% |
| Lived in the same house a year earlier | 94.5%±5.2 pts | 90.9% |
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 4127 earn?
Half of the 1,381 households in Census Tract 4127 earn less than $240,642 a year (±$20,942), against $146,202 across Nassau County: 21st highest of the county's 278 tracts with a reliable estimate.
| Measure | Tract 4127 | Rockville Centre |
|---|---|---|
| Median household income | $240,642±$20,942 | $151,938 |
| Mean household income | $308,187±$38,493 | $204,606 |
| Per capita income | $98,949±$12,341 | $79,394 |
| People below the poverty line | 4.3%±3.1 pts | 4.7% |
| Children under 18 below the poverty line | 1.7%±2.0 pts | 0.7% |
| Households receiving SNAP | 0.0%±3.0 pts | 3.2% |
| Households with a computer | 100.0%±3.0 pts | 93.8% |
| Households with a broadband subscription | 96.5%±3.4 pts | 92.9% |
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 4127?
Owners occupy 97.4% of Census Tract 4127's occupied homes and renters 2.6%. The median owner-occupied home is valued at $865,900 by its owner (±$21,339).
| Measure | Tract 4127 | Rockville Centre |
|---|---|---|
| Median home value (owner-occupied) | $865,900±$21,339 | $818,700 |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 97.4%±3.2 pts | 75.1% |
| Renter-occupied homes | 2.6%±3.2 pts | 24.9% |
| Housing units | 1,399±162 | 10,332 |
| Single-family detached homes | 100.0%±3.0 pts | 60.8% |
| Mobile homes | 0.0%±3.0 pts | 0.0% |
| Built 2020 or later | 0.0%±3.0 pts | 0.0% |
| Built 2010 to 2019 | 2.0%±3.2 pts | 2.8% |
| Built 1939 or earlier | 53.8%±9.3 pts | 43.5% |
| Households with no vehicle | 1.6%±1.9 pts | 10.6% |
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 4127 get to work?
47.4% of Census Tract 4127's workers drive alone and 33.3% work from home. The average trip to work takes 40.9 minutes.
| Measure | Tract 4127 | Rockville Centre |
|---|---|---|
| In the labor force (age 16+) | 69.1%±6.5 pts | 64.4% |
| Unemployment rate | 9.0%±6.4 pts | 5.8% |
| Drove alone to work | 47.4%±8.3 pts | 52.2% |
| Carpooled | 1.0%±1.4 pts | 4.0% |
| Public transportation | 13.1%±4.3 pts | 13.8% |
| Walked | 3.5%±2.3 pts | 2.7% |
| Worked from home | 33.3%±9.1 pts | 25.4% |
| Mean travel time to work | 40.9 min±4.4 | 37.3 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
How does Census Tract 4127 compare with the other tracts in Nassau County?
Among Nassau County's tracts with a reliable estimate, Census Tract 4127 ranks as shown below (1 = highest).
| Measure | In Nassau County | In Rockville Centre |
|---|---|---|
| Population | 178th of 281 | 2nd of 6 |
| Residents per square mile | 96th of 281 | 3rd of 6 |
| Median household income | 21st of 278 | 2nd of 6 |
| Per capita income | 26th of 280 | 2nd of 6 |
| Median home value | 56th of 278 | 3rd of 6 |
| Bachelor's degree or higher | 20th of 278 | 2nd of 6 |
| Median age | 147th of 281 | 4th of 6 |
| Owner-occupied share | 32nd of 276 | 1st of 6 |
The tracts next to it on Nassau County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 3025.01 | 18th | $246,250±$47,264 · within the margin of this tract |
| Tract 3009.01 | 19th | $244,079±$29,496 · within the margin of this tract |
| Tract 4064 | 20th | $244,002±$32,238 · within the margin of this tract |
| Tract 4127 | 21st | $240,642±$20,942 |
| Tract 4065.01 | 22nd | $235,676±$16,899 · within the margin of this tract |
| Tract 3019 | 23rd | $227,311±$22,492 · within the margin of this tract |
| Tract 5197.04 | 24th | $225,125±$60,921 · 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 4127?
3 of the 17 figures for Census Tract 4127 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