Islandia, New York demographics

Islandia, NY demographics: median age 43.3; 32.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Islandia village, New York · Incorporated village · GEOID 3637840. The survey estimates a population of 3,600 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Islandia is 43.3 years, with a 90% margin of error of 10.0 years. There are 1,217 households (±178). 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	43.3 ±10.0	39.8 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 3,600
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Under 18	518 ±134	14.4% ±3.7 pp	20.5%	22.0%
18–34	1,029 ±284	28.6% ±7.9 pp	23.1%	22.8%
35–64	1,430 ±234	39.7% ±6.5 pp	38.5%	38.0%
65 and older	623 ±128	17.3% ±3.6 pp	17.9%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 3,600
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Male	1,941 ±135	53.9% ±3.7 pp	48.8%	49.5%
Female	1,659 ±137	46.1% ±3.8 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: 3,600
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
White alone	1,211 ±251	33.6% ±7.0 pp	55.2%	61.0%
Black or African American alone	643 ±308	17.9% ±8.6 pp	14.4%	12.2%
American Indian and Alaska Native alone	79 ±76 · low precision	2.2% ±2.1 pp · low precision	0.6%	0.9%
Asian alone	227 ±173 · low precision	6.3% ±4.8 pp · low precision	9.1%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±14 · low precision	0.0% ±0.4 pp · low precision	0.0%	0.2%
Some other race alone	903 ±340	25.1% ±9.4 pp	10.4%	7.1%
Two or more races	537 ±330 · low precision	14.9% ±9.2 pp · low precision	10.3%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 3,600
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Not Hispanic or Latino	2,447 ±257	68.0% ±7.1 pp	80.2%	80.7%
Hispanic or Latino	1,153 ±254	32.0% ±7.1 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: 1,217
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Married-couple family	719 ±205	59.1% ±14.5 pp	42.5%	46.9%
Other family: male householder, no spouse present	60 ±39 · low precision	4.9% ±3.1 pp · low precision	5.2%	5.1%
Other family: female householder, no spouse present	154 ±71	12.7% ±5.5 pp	13.7%	12.2%
Nonfamily: householder living alone	251 ±90	20.6% ±6.8 pp	31.1%	28.7%
Nonfamily: householder not living alone	33 ±31 · low precision	2.7% ±2.5 pp · low precision	7.6%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 1,217
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Households with people under 18	291 ±67	23.9% ±4.3 pp	27.3%	29.5%
Households without people under 18	926 ±219	76.1% ±14.1 pp	72.7%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 1,217
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
One-person nonfamily households	251 ±90	20.6% ±6.8 pp	31.1%	28.7%
Two-person households	377 ±218 · low precision	31.0% ±17.3 pp · low precision	31.5%	33.8%
Three-person households	207 ±77	17.0% ±5.8 pp	15.5%	15.3%
Four-person households	213 ±105	17.5% ±8.2 pp	12.4%	12.6%
Five-person households	83 ±40	6.8% ±3.1 pp	5.6%	5.9%
Six-person households	80 ±54 · low precision	6.6% ±4.3 pp · low precision	2.2%	2.2%
Seven or more people	6 ±17 · low precision	0.5% ±1.4 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: 3,600
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Native	2,196 ±264	61.0% ±7.3 pp	77.2%	85.9%
Foreign born	1,404 ±263	39.0% ±7.3 pp	22.8%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 3,425
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
English only	1,857 ±320	54.2% ±9.3 pp	69.1%	77.7%
Spanish	1,114 ±294	32.5% ±8.6 pp	14.8%	13.6%
French, Haitian, or Cajun	84 ±100 · low precision	2.5% ±2.9 pp · low precision	1.5%	0.7%
German or other West Germanic	0 ±14 · low precision	0.0% ±0.4 pp · low precision	1.5%	0.5%
Russian, Polish, or other Slavic	63 ±92 · low precision	1.8% ±2.7 pp · low precision	2.0%	0.7%
Other Indo-European	252 ±181 · low precision	7.4% ±5.3 pp · low precision	4.0%	2.0%
Korean	0 ±14 · low precision	0.0% ±0.4 pp · low precision	0.5%	0.3%
Chinese, including Mandarin and Cantonese	0 ±14 · low precision	0.0% ±0.4 pp · low precision	3.2%	1.1%
Vietnamese	13 ±19 · low precision	0.4% ±0.6 pp · low precision	0.1%	0.5%
Tagalog, including Filipino	0 ±14 · low precision	0.0% ±0.4 pp · low precision	0.4%	0.6%
Other Asian and Pacific Island	12 ±21 · low precision	0.4% ±0.6 pp · low precision	0.9%	1.1%
Arabic	0 ±14 · low precision	0.0% ±0.4 pp · low precision	0.7%	0.5%
Other and unspecified	30 ±46 · low precision	0.9% ±1.3 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: 2,827
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Less than high school graduate	303 ±123	10.7% ±4.3 pp	12.0%	10.4%
High school graduate or equivalency	785 ±315	27.8% ±11.1 pp	24.3%	26.0%
Some college, no degree	535 ±131	18.9% ±4.5 pp	14.6%	19.1%
Associate’s degree	284 ±78	10.0% ±2.7 pp	8.8%	8.8%
Bachelor’s degree	558 ±149	19.7% ±5.2 pp	22.4%	21.6%
Graduate or professional degree	362 ±149	12.8% ±5.2 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: 3,583
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Same house	3,327 ±113	92.9% ±3.0 pp	90.1%	87.7%
Moved within same county	97 ±76 · low precision	2.7% ±2.1 pp · low precision	5.1%	6.3%
Moved from a different county in the same state	112 ±68 · low precision	3.1% ±1.9 pp · low precision	2.6%	3.1%
Moved from a different state	25 ±32 · low precision	0.7% ±0.9 pp · low precision	1.5%	2.3%
Moved from abroad	22 ±33 · low precision	0.6% ±0.9 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

4.2% of Islandia residents (±2.2 percentage points) had no health insurance coverage when surveyed, compared with 5.1% in New York and 8.4% nationally. 90.1% 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	Islandia	New York	U.S.	Compared with New York
People without health insurance Civilian noninstitutionalized population	4.2% ±2.2 pp · low precision	5.1%	8.4%	Not statistically different
Households with a broadband subscription Households	90.1% ±6.0 pp	90.8%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	3.9% ±2.2 pp · low precision	3.7%	6.2%	Not statistically different

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 Islandia . 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 Islandia housing and cost context or return to the city profile.