Village · New York
Old Westbury, New York
Old Westbury, village, in Nassau County, New York. Old Westbury had 5,071 residents on July 1, 2025 by the Census Bureau's estimate, up 17.8% since 2020; the 2020 Census counted 4,289 and the ACS 2020-2024 5-year estimates put it at 4,241 (±168). GEOID 3654705.
Residents, July 2025 estimate
5,071
Census Bureau estimate (no margin published)
2020 Census count: 4,289 · ACS 2020-2024: 4,241 ±168
Median household income
$250,000 or more
The survey's top or bottom value; no margin is published
New York: $85,974
Median home value
$2,000,000 or more
The survey's top or bottom value; no margin is published
New York: $423,800
Median gross rent
$3,500 or more
The survey's top or bottom value; no margin is published
New York: $1,621
Where is Old Westbury and what county is it in?
Old Westbury is a village in Nassau County, New York. It covers 8.6 square miles of land, 500 residents per square mile in 2020.
Old Westbury is in the New York-Newark-Jersey City, NY-NJ metropolitan statistical area, which takes in 22 counties (Census Bureau delineation, July 2023).
Old Westbury lies mostly within the Town of North Hempstead and reaches into the Town of Oyster Bay, towns or townships with their 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 Westbury, and is it growing?
The Census Bureau estimates that 5,071 people lived in Old Westbury on July 1, 2025, up 17.8% since 2020, while New York shrank 1.0%. The 2020 Census counted 4,289 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 4,241 (±168).
| Measure | Old Westbury | Nassau County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 4,241 ±168 | 1,389,591 | −429 |
| Households | 1,007 ±95 | 458,166 | no clear change |
| Average household size | 3.21 ±0.28 | 2.99 | no clear change |
| Housing units | 1,077 ±99 | 479,044 | no clear change |
Old Westbury's population since 2000
From 4,228 in 2000 to 5,071 in 2025: up 19.9%. The 2000, 2010 and 2020 figures are census counts, each for Old Westbury as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
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 Westbury?
The median resident of Old Westbury is 29.5 years old; 12.7% are under 18 and 14.7% are 65 or older. The largest group is non-Hispanic white residents at 73.4%, then non-Hispanic Asian residents at 13.4%. 18.3% of residents were born outside the United States.
| Measure | Old Westbury | Nassau County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 29.5 ±2.9 | 42.0 | no clear change |
| Under 18 years | 12.7% ±3.1 pts | 21.5% | – |
| 65 years and over | 14.7% ±2.7 pts | 18.7% | – |
| Male | 47.5% ±3.1 pts | 49.2% | – |
| Hispanic or Latino (any race) | 5.6% ±2.3 pts | 18.7% | no clear change |
| White alone, not Hispanic | 73.4% ±4.9 pts | 54.3% | +11.7 pts |
| Black or African American alone, not Hispanic | 4.7% ±2.1 pts | 10.8% | no clear change |
| Asian alone, not Hispanic | 13.4% ±4.5 pts | 12.2% | no clear change |
| 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 | 2.9% ±2.2 pts | 3.0% | – |
| Some other race alone, not Hispanic | 0.0% ±1.0 pts | 1.0% | – |
| Born outside the United States | 18.3% ±4.5 pts | 23.3% | no clear change |
| Speak a language other than English at home (age 5+) | 26.2% ±5.7 pts | 30.7% | – |
| Civilian veterans (age 18+) | 1.6% ±1.2 pts | 3.0% | – |
| With a disability | 10.2% ±2.4 pts | 9.4% | – |
| No health insurance coverage | 2.4% ±1.4 pts | 3.8% | no clear change |
| High school graduate or higher (age 25+) | 98.1% ±1.1 pts | 92.2% | – |
| Bachelor's degree or higher (age 25+) | 78.0% ±5.3 pts | 49.7% | no clear change |
| Graduate or professional degree (age 25+) | 40.2% ±6.9 pts | 22.8% | – |
| Lived in the same house a year earlier | 81.5% ±4.1 pts | 93.5% | – |
| Moved from another state in the past year | 6.8% ±2.7 pts | 0.6% | – |
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 Westbury earn?
Half of Old Westbury's 1,007 households earn less than $250,000 or more a year (), against $146,202 in Nassau County and $85,974 in New York. In 2015-2019 it was $250,000 or more in 2024 dollars; the margins of error cannot tell the two periods apart. 3.2% of residents live below the poverty line.
| Measure | Old Westbury | Nassau County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $250,000 or more | $146,202 | no clear change |
| Mean household income | $552,856 ±$101,465 | $191,704 | – |
| Per capita income | $130,551 ±$27,140 | $64,198 | no clear change |
| People below the poverty line | 3.2% ±2.1 pts | 5.4% | – |
| Children under 18 below the poverty line | 0.0% ±8.7 pts | 5.7% | – |
| Households receiving SNAP | 0.0% ±4.1 pts | 5.0% | – |
| Households with a computer | 98.9% ±1.6 pts | 96.5% | – |
| Households with a broadband subscription | 96.5% ±2.5 pts | 94.8% | – |
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 Westbury?
Owners occupy 92.6% of Old Westbury's occupied homes and renters 7.4%. The median owner-occupied home is valued at $2,000,000 or more by its owner (). The median renter pays $3,500 or more a month including utilities.
| Measure | Old Westbury | Nassau County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $2,000,000 or more | $684,700 | −$285,274 |
| Median gross rent | $3,500 or more | $2,252 | – |
| Renters paying 35% or more of income on rent | 43.8% ±32.7 pts | 45.5% | – |
| Median monthly owner costs, with a mortgage | $4,000 or more | $3,795 | – |
| Owner-occupied homes | 92.6% ±4.7 pts | 81.9% | no clear change |
| Renter-occupied homes | 7.4% ±4.7 pts | 18.1% | – |
| Housing units | 1,077 ±99 | 479,044 | no clear change |
| Homeowner vacancy rate | 0.0% ±4.5 pts | 0.7% | – |
| Rental vacancy rate | 20.2% ±31.0 pts | 4.5% | – |
| Single-family detached homes | 94.9% ±3.0 pts | 76.1% | – |
| Mobile homes | 1.6% ±2.2 pts | 0.2% | – |
| Built 2020 or later | 0.0% ±3.9 pts | 0.8% | – |
| Built 2010 to 2019 | 8.3% ±5.5 pts | 3.2% | – |
| Built 1939 or earlier | 14.9% ±8.7 pts | 19.2% | – |
| Households with no vehicle | 0.0% ±4.1 pts | 6.8% | – |
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 many new homes is Old Westbury building?
Builders took permits for 4 new housing units in Old Westbury in 2025 (4 in single-family houses), 0.8 per 1,000 residents against 1.9 across New York.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Old Westbury work and get to work?
49.0% of Old Westbury's workers drive alone and 23.1% work from home. The average trip to work takes 33.5 minutes.
| Measure | Old Westbury | Nassau County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 52.7% ±5.4 pts | 64.8% | – |
| Unemployment rate | 5.2% ±3.8 pts | 4.8% | – |
| Drove alone to work | 49.0% ±7.2 pts | 60.7% | – |
| Carpooled | 4.5% ±3.1 pts | 7.3% | – |
| Public transportation | 11.7% ±4.2 pts | 12.5% | – |
| Walked | 10.5% ±3.5 pts | 2.0% | – |
| Worked from home | 23.1% ±7.7 pts | 15.6% | +12.7 pts |
| Mean travel time to work | 33.5 min ±4.2 | 36.0 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 Westbury?
2 census tracts lie mostly in Old Westbury, and 3 more reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 3025.02Nassau County | 2,763 | $250,000 or more |
| Tract 5177.05Nassau County | 2,359 | $250,000 or more |
| Tract 9821Nassau County | 1,003 | not published |
| Tract 5185.01Nassau County | 6,418 | $155,682 |
| Tract 9811Nassau County | 986 | not published |
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 Westbury) · Census block assignment files
How does Old Westbury compare with other places in New York?
By the Census Bureau's July 2025 estimates, Old Westbury is the 4,852nd-most populous of the 19,476 U.S. incorporated places that have one and the 168th-most populous of 594 in New York.
Old Westbury ranks 1st of 1,623 places in New York with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 168th | 594 |
| Growth 2020-2025 (PEP) | 7th | 1,225 |
| Residents per square mile | 857th | 1,657 |
| Median household income | 1st | 1,623 |
| Per capita income | 25th | 1,653 |
| Median home value | 1st | 1,637 |
| Median gross rent | 1st | 1,515 |
| Poverty rate | 1,275th | 1,331 |
| Bachelor's degree or higher | 35th | 1,640 |
| Median age | 1,583rd | 1,654 |
| Owner-occupied share | 163rd | 1,639 |
| Work from home | 137th | 1,350 |
| Travel time to work | 296th | 1,652 |
Old Westbury's figures with every place in New York (CSV)
Every place in New York, sortable · Compare Old Westbury 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 Westbury?
16 of the 57 figures for Old Westbury 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 Westbury 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' public schools in Old Westbury.