Ansonia, Connecticut demographics

Ansonia, CT demographics: median age 40.1; 21.9% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Ansonia city, Connecticut · Incorporated city · GEOID 0901150. The survey estimates a population of 19,033 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Ansonia is 40.1 years, with a 90% margin of error of 1.6 years. There are 7,212 households (±480). 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	40.1 ±1.6	41.1 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 19,033
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Under 18	3,478 ±529	18.3% ±2.8 pp	20.2%	22.0%
18–34	4,662 ±649	24.5% ±3.4 pp	21.9%	22.8%
35–64	7,456 ±722	39.2% ±3.8 pp	39.4%	38.0%
65 and older	3,437 ±509	18.1% ±2.7 pp	18.5%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 19,033
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Male	9,237 ±525	48.5% ±2.8 pp	49.1%	49.5%
Female	9,796 ±530	51.5% ±2.8 pp	50.9%	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: 19,033
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
White alone	10,421 ±971	54.8% ±5.1 pp	65.1%	61.0%
Black or African American alone	2,672 ±758	14.0% ±4.0 pp	10.6%	12.2%
American Indian and Alaska Native alone	12 ±17 · low precision	0.1% ±0.1 pp · low precision	0.3%	0.9%
Asian alone	394 ±267 · low precision	2.1% ±1.4 pp · low precision	4.8%	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	3,134 ±1,022	16.5% ±5.4 pp	7.7%	7.1%
Two or more races	2,400 ±684	12.6% ±3.6 pp	11.4%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 19,033
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Not Hispanic or Latino	13,753 ±863	72.3% ±4.5 pp	81.7%	80.7%
Hispanic or Latino	5,280 ±857	27.7% ±4.5 pp	18.3%	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: 7,212
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Married-couple family	2,852 ±393	39.5% ±4.8 pp	46.6%	46.9%
Other family: male householder, no spouse present	575 ±256	8.0% ±3.5 pp	5.0%	5.1%
Other family: female householder, no spouse present	1,413 ±326	19.6% ±4.3 pp	12.7%	12.2%
Nonfamily: householder living alone	2,015 ±439	27.9% ±5.8 pp	29.1%	28.7%
Nonfamily: householder not living alone	357 ±163	5.0% ±2.2 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 7,212
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Households with people under 18	2,223 ±321	30.8% ±3.9 pp	28.6%	29.5%
Households without people under 18	4,989 ±554	69.2% ±6.1 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 7,212
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
One-person nonfamily households	2,015 ±439	27.9% ±5.8 pp	29.1%	28.7%
Two-person households	2,221 ±496	30.8% ±6.6 pp	33.4%	33.8%
Three-person households	1,281 ±284	17.8% ±3.8 pp	16.4%	15.3%
Four-person households	838 ±226	11.6% ±3.0 pp	13.3%	12.6%
Five-person households	550 ±192	7.6% ±2.6 pp	5.4%	5.9%
Six-person households	173 ±83	2.4% ±1.1 pp	1.7%	2.2%
Seven or more people	134 ±96 · low precision	1.9% ±1.3 pp · low precision	0.9%	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: 19,033
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Native	15,205 ±770	79.9% ±4.0 pp	84.3%	85.9%
Foreign born	3,828 ±769	20.1% ±4.0 pp	15.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 18,098
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
English only	12,596 ±897	69.6% ±4.9 pp	76.6%	77.7%
Spanish	3,261 ±667	18.0% ±3.7 pp	12.8%	13.6%
French, Haitian, or Cajun	441 ±559 · low precision	2.4% ±3.1 pp · low precision	1.2%	0.7%
German or other West Germanic	9 ±15 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	350 ±256 · low precision	1.9% ±1.4 pp · low precision	1.5%	0.7%
Other Indo-European	718 ±460 · low precision	4.0% ±2.5 pp · low precision	4.0%	2.0%
Korean	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.2%	0.3%
Chinese, including Mandarin and Cantonese	178 ±204 · low precision	1.0% ±1.1 pp · low precision	0.9%	1.1%
Vietnamese	0 ±21 · low precision	0.0% ±0.1 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	9 ±15 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.6%
Other Asian and Pacific Island	90 ±86 · low precision	0.5% ±0.5 pp · low precision	0.9%	1.1%
Arabic	367 ±508 · low precision	2.0% ±2.8 pp · low precision	0.4%	0.5%
Other and unspecified	79 ±120 · low precision	0.4% ±0.7 pp · low precision	0.7%	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: 13,671
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Less than high school graduate	1,415 ±373	10.4% ±2.7 pp	8.5%	10.4%
High school graduate or equivalency	5,327 ±685	39.0% ±4.8 pp	25.3%	26.0%
Some college, no degree	2,775 ±533	20.3% ±3.8 pp	16.1%	19.1%
Associate’s degree	1,159 ±251	8.5% ±1.8 pp	7.6%	8.8%
Bachelor’s degree	1,777 ±331	13.0% ±2.4 pp	23.3%	21.6%
Graduate or professional degree	1,218 ±287	8.9% ±2.1 pp	19.2%	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: 18,923
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Same house	17,440 ±490	92.2% ±2.5 pp	89.2%	87.7%
Moved within same county	726 ±331	3.8% ±1.7 pp	5.6%	6.3%
Moved from a different county in the same state	676 ±342 · low precision	3.6% ±1.8 pp · low precision	2.0%	3.1%
Moved from a different state	68 ±107 · low precision	0.4% ±0.6 pp · low precision	2.6%	2.3%
Moved from abroad	13 ±20 · low precision	0.1% ±0.1 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

7.4% of Ansonia residents (±2.3 percentage points) had no health insurance coverage when surveyed, compared with 5.4% in Connecticut and 8.4% nationally. 91.5% 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	Ansonia	Connecticut	U.S.	Compared with Connecticut
People without health insurance Civilian noninstitutionalized population	7.4% ±2.3 pp	5.4%	8.4%	Not statistically different
Households with a broadband subscription Households	91.5% ±1.3 pp	92.2%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	4.8% ±1.5 pp	4.7%	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 Ansonia . 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 Ansonia housing and cost context or return to the city profile.