Old Westbury, New York demographics

Old Westbury, NY demographics: median age 29.5; 78.0% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Old Westbury village, New York · Incorporated village · GEOID 3654705. The survey estimates a population of 4,241 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Old Westbury is 29.5 years, with a 90% margin of error of 2.9 years. There are 1,007 households (±95). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	29.5 ±2.9	39.8 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 4,241
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Under 18	539 ±128	12.7% ±3.0 pp	20.5%	22.0%
18–34	1,797 ±257	42.4% ±5.8 pp	23.1%	22.8%
35–64	1,283 ±193	30.3% ±4.4 pp	38.5%	38.0%
65 and older	622 ±114	14.7% ±2.6 pp	17.9%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 4,241
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Male	2,015 ±163	47.5% ±3.4 pp	48.8%	49.5%
Female	2,226 ±145	52.5% ±2.7 pp	51.2%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 4,241
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
White alone	3,216 ±251	75.8% ±5.1 pp	55.2%	61.0%
Black or African American alone	217 ±96	5.1% ±2.3 pp	14.4%	12.2%
American Indian and Alaska Native alone	0 ±14 · low precision	0.0% ±0.3 pp · low precision	0.6%	0.9%
Asian alone	568 ±188	13.4% ±4.4 pp	9.1%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±14 · low precision	0.0% ±0.3 pp · low precision	0.0%	0.2%
Some other race alone	57 ±48 · low precision	1.3% ±1.1 pp · low precision	10.4%	7.1%
Two or more races	183 ±98 · low precision	4.3% ±2.3 pp · low precision	10.3%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 4,241
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Not Hispanic or Latino	4,005 ±195	94.4% ±2.7 pp	80.2%	80.7%
Hispanic or Latino	236 ±96	5.6% ±2.3 pp	19.8%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 1,007
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Married-couple family	730 ±84	72.5% ±4.8 pp	42.5%	46.9%
Other family: male householder, no spouse present	10 ±13 · low precision	1.0% ±1.3 pp · low precision	5.2%	5.1%
Other family: female householder, no spouse present	92 ±55 · low precision	9.1% ±5.4 pp · low precision	13.7%	12.2%
Nonfamily: householder living alone	116 ±57	11.5% ±5.6 pp	31.1%	28.7%
Nonfamily: householder not living alone	59 ±80 · low precision	5.9% ±7.9 pp · low precision	7.6%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 1,007
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Households with people under 18	238 ±63	23.6% ±5.8 pp	27.3%	29.5%
Households without people under 18	769 ±118	76.4% ±9.2 pp	72.7%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 1,007
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
One-person nonfamily households	116 ±57	11.5% ±5.6 pp	31.1%	28.7%
Two-person households	370 ±117	36.7% ±11.1 pp	31.5%	33.8%
Three-person households	144 ±63	14.3% ±6.1 pp	15.5%	15.3%
Four-person households	185 ±65	18.4% ±6.2 pp	12.4%	12.6%
Five-person households	131 ±66 · low precision	13.0% ±6.4 pp	5.6%	5.9%
Six-person households	49 ±36 · low precision	4.9% ±3.5 pp · low precision	2.2%	2.2%
Seven or more people	12 ±20 · low precision	1.2% ±2.0 pp · low precision	1.7%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 4,241
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Native	3,463 ±251	81.7% ±5.0 pp	77.2%	85.9%
Foreign born	778 ±192	18.3% ±4.5 pp	22.8%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 4,178
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
English only	3,084 ±276	73.8% ±5.9 pp	69.1%	77.7%
Spanish	196 ±81	4.7% ±1.9 pp	14.8%	13.6%
French, Haitian, or Cajun	29 ±29 · low precision	0.7% ±0.7 pp · low precision	1.5%	0.7%
German or other West Germanic	0 ±14 · low precision	0.0% ±0.3 pp · low precision	1.5%	0.5%
Russian, Polish, or other Slavic	151 ±160 · low precision	3.6% ±3.8 pp · low precision	2.0%	0.7%
Other Indo-European	389 ±198 · low precision	9.3% ±4.7 pp · low precision	4.0%	2.0%
Korean	60 ±52 · low precision	1.4% ±1.2 pp · low precision	0.5%	0.3%
Chinese, including Mandarin and Cantonese	127 ±67 · low precision	3.0% ±1.6 pp · low precision	3.2%	1.1%
Vietnamese	0 ±14 · low precision	0.0% ±0.3 pp · low precision	0.1%	0.5%
Tagalog, including Filipino	0 ±14 · low precision	0.0% ±0.3 pp · low precision	0.4%	0.6%
Other Asian and Pacific Island	51 ±41 · low precision	1.2% ±1.0 pp · low precision	0.9%	1.1%
Arabic	13 ±14 · low precision	0.3% ±0.3 pp · low precision	0.7%	0.5%
Other and unspecified	78 ±57 · low precision	1.9% ±1.4 pp · low precision	1.3%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 2,372
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Less than high school graduate	44 ±55 · low precision	1.9% ±2.3 pp · low precision	12.0%	10.4%
High school graduate or equivalency	135 ±67	5.7% ±2.8 pp	24.3%	26.0%
Some college, no degree	224 ±88	9.4% ±3.6 pp	14.6%	19.1%
Associate’s degree	119 ±91 · low precision	5.0% ±3.8 pp · low precision	8.8%	8.8%
Bachelor’s degree	896 ±134	37.8% ±4.7 pp	22.4%	21.6%
Graduate or professional degree	954 ±181	40.2% ±6.9 pp	17.9%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 4,221
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Same house	3,439 ±220	81.5% ±4.0 pp	90.1%	87.7%
Moved within same county	165 ±86 · low precision	3.9% ±2.0 pp · low precision	5.1%	6.3%
Moved from a different county in the same state	298 ±126	7.1% ±3.0 pp	2.6%	3.1%
Moved from a different state	286 ±113	6.8% ±2.7 pp	1.5%	2.3%
Moved from abroad	33 ±32 · low precision	0.8% ±0.8 pp · low precision	0.7%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

2.4% of Old Westbury residents (±1.2 percentage points) had no health insurance coverage when surveyed, compared with 5.1% in New York and 8.4% nationally. 96.5% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	Old Westbury	New York	U.S.	Compared with New York
People without health insurance Civilian noninstitutionalized population	2.4% ±1.2 pp	5.1%	8.4%	Lower
Households with a broadband subscription Households	96.5% ±2.8 pp	90.8%	91.0%	Higher
Veterans Civilian population age 18 and older	1.6% ±1.2 pp · low precision	3.7%	6.2%	Lower

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for Old Westbury . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read Old Westbury housing and cost context or return to the city profile.