Census tract · Nassau County
Census Tract 4121, Nassau County, New York
Census Tract 4121, GEOID 36059412100, in Nassau County, New York, entirely within East Rockaway and Hempstead (town). 6,218 residents in the ACS 2020-2024 5-year estimates (±561); the 2020 Census counted 6,527.
Residents, 2020-2024
6,218
±561 (90% margin)
2020 Census count: 6,527
Median household income
$125,044
±$21,066 (90% margin)
Nassau County: $146,202
Median home value
$601,100
±$59,283 (90% margin)
Nassau County: $684,700
Median gross rent
$2,397
±$178 (90% margin)
Nassau County: $2,252
Where is Census Tract 4121?
Census Tract 4121 is one of 286 census tracts in Nassau County, New York. It covers 0.66 square miles of land, 9,860 residents per square mile in 2020. Its GEOID, 36059412100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| East Rockaway | 100% |
| Hempstead (town) | 100% |
7 census tracts border Census Tract 4121: Tract 4117 ($140,765), Tract 4119.01 ($86,563), Tract 4119.02 ($155,795), Tract 4120 ($135,293), Tract 4122 ($114,183), Tract 4123.01 ($104,473) and Tract 4130.01 ($123,487). 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 4121?
The 2020-2024 American Community Survey puts Census Tract 4121's population at 6,218 (±561) in 2,326 households; the 2020 Census counted 6,527 residents and 2,653 housing units.
| Measure | Tract 4121 | East Rockaway |
|---|---|---|
| Total population | 6,218 ±561 | 10,077 |
| Households | 2,326 ±229 | 3,806 |
| Average household size | 2.62 ±0.25 | 2.62 |
| Housing units | 2,568 ±247 | 4,095 |
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 4121?
The median resident of Census Tract 4121 is 41.4 years old; 19.9% are under 18 and 17.1% are 65 or older. The largest group is non-Hispanic white residents at 81.0%, then Hispanic or Latino residents (of any race) at 10.7%. 14.9% of residents were born outside the United States.
| Measure | Tract 4121 | East Rockaway |
|---|---|---|
| Median age | 41.4 ±6.4 | 41.5 |
| Under 18 years | 19.9% ±4.5 pts | 21.7% |
| 65 years and over | 17.1% ±4.6 pts | 17.1% |
| Hispanic or Latino (any race) | 10.7% ±3.6 pts | 13.1% |
| White alone, not Hispanic | 81.0% ±6.9 pts | 79.6% |
| Black or African American alone, not Hispanic | 5.4% ±5.3 pts | 3.8% |
| Asian alone, not Hispanic | 1.8% ±1.6 pts | 1.3% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Two or more races, not Hispanic | 0.7% ±0.9 pts | 2.0% |
| Some other race alone, not Hispanic | 0.4% ±0.6 pts | 0.2% |
| Born outside the United States | 14.9% ±4.6 pts | 13.9% |
| Speak a language other than English at home (age 5+) | 17.6% ±4.3 pts | 14.3% |
| Civilian veterans (age 18+) | 4.0% ±2.7 pts | 4.0% |
| With a disability | 9.1% ±3.3 pts | 8.5% |
| No health insurance coverage | 3.1% ±1.5 pts | 2.5% |
| High school graduate or higher (age 25+) | 95.4% ±2.8 pts | 94.5% |
| Bachelor's degree or higher (age 25+) | 50.2% ±8.1 pts | 51.2% |
| Graduate or professional degree (age 25+) | 23.2% ±5.6 pts | 25.4% |
| Lived in the same house a year earlier | 92.5% ±5.3 pts | 93.1% |
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 4121 earn?
Half of the 2,326 households in Census Tract 4121 earn less than $125,044 a year (±$21,066), against $146,202 across Nassau County: 215th highest of the county's 278 tracts with a reliable estimate.
| Measure | Tract 4121 | East Rockaway |
|---|---|---|
| Median household income | $125,044 ±$21,066 | $124,929 |
| Mean household income | $159,503 ±$22,102 | $175,071 |
| Per capita income | $60,555 ±$8,670 | $66,941 |
| People below the poverty line | 1.8% ±1.6 pts | 2.6% |
| Children under 18 below the poverty line | 0.0% ±3.4 pts | 0.2% |
| Households receiving SNAP | 0.0% ±1.8 pts | 3.3% |
| Households with a computer | 97.8% ±2.4 pts | 96.3% |
| Households with a broadband subscription | 94.7% ±3.7 pts | 94.4% |
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 4121?
Owners occupy 73.5% of Census Tract 4121's occupied homes and renters 26.5%. The median owner-occupied home is valued at $601,100 by its owner (±$59,283). The median renter pays $2,397 a month including utilities, and 44.0% of renters pay 35% or more of their income on rent.
| Measure | Tract 4121 | East Rockaway |
|---|---|---|
| Median home value (owner-occupied) | $601,100 ±$59,283 | $621,300 |
| Median gross rent | $2,397 ±$178 | $2,416 |
| Renters paying 35% or more of income on rent | 44.0% ±23.1 pts | 43.5% |
| Median monthly owner costs, with a mortgage | $3,575 ±$496 | $4,000 or more |
| Owner-occupied homes | 73.5% ±7.5 pts | 79.4% |
| Renter-occupied homes | 26.5% ±7.5 pts | 20.6% |
| Housing units | 2,568 ±247 | 4,095 |
| Single-family detached homes | 50.8% ±6.7 pts | 61.5% |
| Mobile homes | 0.0% ±1.6 pts | 0.0% |
| Built 2020 or later | 2.1% ±3.4 pts | 1.3% |
| Built 2010 to 2019 | 0.0% ±1.6 pts | 2.3% |
| Built 1939 or earlier | 44.0% ±9.5 pts | 39.0% |
| Households with no vehicle | 6.4% ±3.3 pts | 4.6% |
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 4121 get to work?
72.0% of Census Tract 4121's workers drive alone and 9.6% work from home. The average trip to work takes 38.9 minutes.
| Measure | Tract 4121 | East Rockaway |
|---|---|---|
| In the labor force (age 16+) | 66.5% ±5.6 pts | 68.3% |
| Unemployment rate | 1.9% ±1.6 pts | 3.2% |
| Drove alone to work | 72.0% ±5.7 pts | 68.5% |
| Carpooled | 2.3% ±2.1 pts | 1.5% |
| Public transportation | 13.9% ±5.5 pts | 10.2% |
| Walked | 2.1% ±2.8 pts | 1.4% |
| Worked from home | 9.6% ±4.5 pts | 16.9% |
| Mean travel time to work | 38.9 min ±5.5 | 38.5 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 4121 compare with the other tracts in Nassau County?
Among Nassau County's tracts with a reliable estimate, Census Tract 4121 ranks as shown below (1 = highest).
| Measure | In Nassau County |
|---|---|
| Population | 61st of 281 |
| Residents per square mile | 69th of 281 |
| Median household income | 215th of 278 |
| Per capita income | 147th of 280 |
| Median home value | 210th of 278 |
| Median gross rent | 109th of 205 |
| Bachelor's degree or higher | 134th of 278 |
| Median age | 161st of 281 |
| Owner-occupied share | 218th of 276 |
The tracts next to it on Nassau County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 5185.02 | 212th | $125,547±$40,925 · within the margin of this tract |
| Tract 4055 | 213th | $125,428±$29,125 · within the margin of this tract |
| Tract 5204.02 | 214th | $125,147±$29,604 · within the margin of this tract |
| Tract 4121 | 215th | $125,044±$21,066 |
| Tract 3041 | 216th | $124,792±$23,787 · within the margin of this tract |
| Tract 4168.02 | 217th | $124,725±$33,983 · within the margin of this tract |
| Tract 4130.01 | 218th | $123,487±$27,348 · 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 4121?
3 of the 18 figures for Census Tract 4121 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