Mamaroneck, New York demographics

Mamaroneck, NY demographics: median age 40.3; 56.6% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Mamaroneck village, New York · Incorporated village · GEOID 3644831. The survey estimates a population of 19,826 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Mamaroneck is 40.3 years, with a 90% margin of error of 3.2 years. There are 7,276 households (±396). 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	40.3 ±3.2	39.8 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 19,826
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Under 18	4,846 ±675	24.4% ±3.4 pp	20.5%	22.0%
18–34	3,848 ±728	19.4% ±3.7 pp	23.1%	22.8%
35–64	8,304 ±785	41.9% ±4.0 pp	38.5%	38.0%
65 and older	2,828 ±385	14.3% ±1.9 pp	17.9%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 19,826
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Male	9,700 ±471	48.9% ±2.4 pp	48.8%	49.5%
Female	10,126 ±474	51.1% ±2.4 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: 19,826
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
White alone	11,907 ±1,222	60.1% ±6.2 pp	55.2%	61.0%
Black or African American alone	994 ±529 · low precision	5.0% ±2.7 pp · low precision	14.4%	12.2%
American Indian and Alaska Native alone	342 ±285 · low precision	1.7% ±1.4 pp · low precision	0.6%	0.9%
Asian alone	1,155 ±364	5.8% ±1.8 pp	9.1%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	3,008 ±1,306	15.2% ±6.6 pp	10.4%	7.1%
Two or more races	2,420 ±653	12.2% ±3.3 pp	10.3%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 19,826
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Not Hispanic or Latino	14,422 ±1,171	72.7% ±5.9 pp	80.2%	80.7%
Hispanic or Latino	5,404 ±1,168	27.3% ±5.9 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: 7,276
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Married-couple family	4,094 ±376	56.3% ±4.2 pp	42.5%	46.9%
Other family: male householder, no spouse present	257 ±125	3.5% ±1.7 pp	5.2%	5.1%
Other family: female householder, no spouse present	901 ±270	12.4% ±3.6 pp	13.7%	12.2%
Nonfamily: householder living alone	1,817 ±423	25.0% ±5.7 pp	31.1%	28.7%
Nonfamily: householder not living alone	207 ±121 · low precision	2.8% ±1.7 pp · low precision	7.6%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 7,276
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Households with people under 18	2,742 ±273	37.7% ±3.1 pp	27.3%	29.5%
Households without people under 18	4,534 ±510	62.3% ±6.1 pp	72.7%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 7,276
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
One-person nonfamily households	1,817 ±423	25.0% ±5.7 pp	31.1%	28.7%
Two-person households	2,116 ±409	29.1% ±5.4 pp	31.5%	33.8%
Three-person households	1,423 ±263	19.6% ±3.5 pp	15.5%	15.3%
Four-person households	1,276 ±230	17.5% ±3.0 pp	12.4%	12.6%
Five-person households	431 ±148	5.9% ±2.0 pp	5.6%	5.9%
Six-person households	197 ±164 · low precision	2.7% ±2.3 pp · low precision	2.2%	2.2%
Seven or more people	16 ±36 · low precision	0.2% ±0.5 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: 19,826
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Native	14,015 ±739	70.7% ±3.7 pp	77.2%	85.9%
Foreign born	5,811 ±730	29.3% ±3.7 pp	22.8%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 18,762
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
English only	10,831 ±1,059	57.7% ±5.6 pp	69.1%	77.7%
Spanish	4,435 ±1,206	23.6% ±6.4 pp	14.8%	13.6%
French, Haitian, or Cajun	422 ±201	2.2% ±1.1 pp	1.5%	0.7%
German or other West Germanic	148 ±117 · low precision	0.8% ±0.6 pp · low precision	1.5%	0.5%
Russian, Polish, or other Slavic	343 ±242 · low precision	1.8% ±1.3 pp · low precision	2.0%	0.7%
Other Indo-European	1,622 ±425	8.6% ±2.3 pp	4.0%	2.0%
Korean	79 ±82 · low precision	0.4% ±0.4 pp · low precision	0.5%	0.3%
Chinese, including Mandarin and Cantonese	257 ±152 · low precision	1.4% ±0.8 pp · low precision	3.2%	1.1%
Vietnamese	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.5%
Tagalog, including Filipino	18 ±30 · low precision	0.1% ±0.2 pp · low precision	0.4%	0.6%
Other Asian and Pacific Island	369 ±180	2.0% ±1.0 pp	0.9%	1.1%
Arabic	136 ±118 · low precision	0.7% ±0.6 pp · low precision	0.7%	0.5%
Other and unspecified	102 ±109 · low precision	0.5% ±0.6 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: 13,525
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Less than high school graduate	1,636 ±488	12.1% ±3.6 pp	12.0%	10.4%
High school graduate or equivalency	2,227 ±575	16.5% ±4.2 pp	24.3%	26.0%
Some college, no degree	1,512 ±357	11.2% ±2.6 pp	14.6%	19.1%
Associate’s degree	496 ±183	3.7% ±1.3 pp	8.8%	8.8%
Bachelor’s degree	3,735 ±521	27.6% ±3.7 pp	22.4%	21.6%
Graduate or professional degree	3,919 ±469	29.0% ±3.3 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: 19,601
Category	Count ± MOE	Share ± MOE (pp)	New York	U.S.
Same house	17,609 ±568	89.8% ±2.8 pp	90.1%	87.7%
Moved within same county	678 ±247	3.5% ±1.3 pp	5.1%	6.3%
Moved from a different county in the same state	596 ±324 · low precision	3.0% ±1.7 pp · low precision	2.6%	3.1%
Moved from a different state	379 ±213 · low precision	1.9% ±1.1 pp · low precision	1.5%	2.3%
Moved from abroad	339 ±285 · low precision	1.7% ±1.5 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

7.0% of Mamaroneck residents (±3.4 percentage points) had no health insurance coverage when surveyed, compared with 5.1% in New York and 8.4% nationally. 97.0% 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	Mamaroneck	New York	U.S.	Compared with New York
People without health insurance Civilian noninstitutionalized population	7.0% ±3.4 pp	5.1%	8.4%	Not statistically different
Households with a broadband subscription Households	97.0% ±1.1 pp	90.8%	91.0%	Higher
Veterans Civilian population age 18 and older	2.4% ±1.1 pp	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 Mamaroneck . 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 Mamaroneck housing and cost context or return to the city profile.