Waterbury, Connecticut demographics

Waterbury, CT demographics: median age 37.8; 17.3% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Waterbury city, Connecticut · Incorporated city · GEOID 0980000. The survey estimates a population of 114,869 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Waterbury is 37.8 years, with a 90% margin of error of 1.3 years. There are 45,663 households (±1,010). 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	37.8 ±1.3	41.1 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 114,869
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Under 18	26,613 ±1,374	23.2% ±1.2 pp	20.2%	22.0%
18–34	26,771 ±1,277	23.3% ±1.1 pp	21.9%	22.8%
35–64	43,892 ±1,859	38.2% ±1.6 pp	39.4%	38.0%
65 and older	17,593 ±1,086	15.3% ±0.9 pp	18.5%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 114,869
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Male	54,798 ±982	47.7% ±0.9 pp	49.1%	49.5%
Female	60,071 ±970	52.3% ±0.8 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: 114,869
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
White alone	42,814 ±2,115	37.3% ±1.8 pp	65.1%	61.0%
Black or African American alone	29,003 ±1,858	25.2% ±1.6 pp	10.6%	12.2%
American Indian and Alaska Native alone	353 ±290 · low precision	0.3% ±0.3 pp · low precision	0.3%	0.9%
Asian alone	2,900 ±889	2.5% ±0.8 pp	4.8%	6.0%
Native Hawaiian and Other Pacific Islander alone	88 ±101 · low precision	0.1% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	18,606 ±2,112	16.2% ±1.8 pp	7.7%	7.1%
Two or more races	21,105 ±1,882	18.4% ±1.6 pp	11.4%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 114,869
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Not Hispanic or Latino	70,591 ±1,926	61.5% ±1.7 pp	81.7%	80.7%
Hispanic or Latino	44,278 ±1,930	38.5% ±1.7 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: 45,663
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Married-couple family	14,120 ±1,122	30.9% ±2.4 pp	46.6%	46.9%
Other family: male householder, no spouse present	2,959 ±589	6.5% ±1.3 pp	5.0%	5.1%
Other family: female householder, no spouse present	10,686 ±808	23.4% ±1.7 pp	12.7%	12.2%
Nonfamily: householder living alone	15,598 ±1,247	34.2% ±2.6 pp	29.1%	28.7%
Nonfamily: householder not living alone	2,300 ±495	5.0% ±1.1 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 45,663
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Households with people under 18	15,552 ±859	34.1% ±1.7 pp	28.6%	29.5%
Households without people under 18	30,111 ±1,448	65.9% ±2.8 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 45,663
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
One-person nonfamily households	15,598 ±1,247	34.2% ±2.6 pp	29.1%	28.7%
Two-person households	12,040 ±1,118	26.4% ±2.4 pp	33.4%	33.8%
Three-person households	7,117 ±889	15.6% ±1.9 pp	16.4%	15.3%
Four-person households	6,037 ±722	13.2% ±1.6 pp	13.3%	12.6%
Five-person households	3,108 ±490	6.8% ±1.1 pp	5.4%	5.9%
Six-person households	928 ±288	2.0% ±0.6 pp	1.7%	2.2%
Seven or more people	835 ±264	1.8% ±0.6 pp	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: 114,869
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Native	91,835 ±1,864	79.9% ±1.6 pp	84.3%	85.9%
Foreign born	23,034 ±1,864	20.1% ±1.6 pp	15.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 107,620
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
English only	65,329 ±2,563	60.7% ±2.4 pp	76.6%	77.7%
Spanish	30,603 ±2,098	28.4% ±1.9 pp	12.8%	13.6%
French, Haitian, or Cajun	2,024 ±595	1.9% ±0.6 pp	1.2%	0.7%
German or other West Germanic	17 ±29 · low precision	0.0% ±0.0 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	331 ±211 · low precision	0.3% ±0.2 pp · low precision	1.5%	0.7%
Other Indo-European	6,533 ±1,151	6.1% ±1.1 pp	4.0%	2.0%
Korean	10 ±19 · low precision	0.0% ±0.0 pp · low precision	0.2%	0.3%
Chinese, including Mandarin and Cantonese	293 ±210 · low precision	0.3% ±0.2 pp · low precision	0.9%	1.1%
Vietnamese	175 ±173 · low precision	0.2% ±0.2 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	191 ±164 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.6%
Other Asian and Pacific Island	342 ±164	0.3% ±0.2 pp	0.9%	1.1%
Arabic	609 ±467 · low precision	0.6% ±0.4 pp · low precision	0.4%	0.5%
Other and unspecified	1,163 ±481	1.1% ±0.4 pp	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: 77,847
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Less than high school graduate	14,953 ±1,341	19.2% ±1.7 pp	8.5%	10.4%
High school graduate or equivalency	28,218 ±1,530	36.2% ±1.9 pp	25.3%	26.0%
Some college, no degree	14,407 ±1,182	18.5% ±1.5 pp	16.1%	19.1%
Associate’s degree	6,802 ±921	8.7% ±1.2 pp	7.6%	8.8%
Bachelor’s degree	8,055 ±875	10.3% ±1.1 pp	23.3%	21.6%
Graduate or professional degree	5,412 ±752	7.0% ±1.0 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: 113,635
Category	Count ± MOE	Share ± MOE (pp)	Connecticut	U.S.
Same house	101,557 ±1,680	89.4% ±1.5 pp	89.2%	87.7%
Moved within same county	6,883 ±1,166	6.1% ±1.0 pp	5.6%	6.3%
Moved from a different county in the same state	2,128 ±514	1.9% ±0.5 pp	2.0%	3.1%
Moved from a different state	2,084 ±672	1.8% ±0.6 pp	2.6%	2.3%
Moved from abroad	983 ±453	0.9% ±0.4 pp	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

8.4% of Waterbury residents (±1.1 percentage points) had no health insurance coverage when surveyed, compared with 5.4% in Connecticut and 8.4% nationally. 85.3% 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	Waterbury	Connecticut	U.S.	Compared with Connecticut
People without health insurance Civilian noninstitutionalized population	8.4% ±1.1 pp	5.4%	8.4%	Higher
Households with a broadband subscription Households	85.3% ±1.4 pp	92.2%	91.0%	Lower
Veterans Civilian population age 18 and older	3.6% ±0.6 pp	4.7%	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 Waterbury . 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 Waterbury housing and cost context or return to the city profile.