Quincy, Massachusetts demographics

Quincy, MA demographics: median age 38.6; 50.3% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Quincy city, Massachusetts · Incorporated city · GEOID 2555745. The survey estimates a population of 102,114 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Quincy is 38.6 years, with a 90% margin of error of 0.8 years. There are 45,285 households (±929). 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	38.6 ±0.8	40.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 102,114
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
Under 18	14,758 ±1,024	14.5% ±1.0 pp	19.4%	22.0%
18–34	30,153 ±1,454	29.5% ±1.4 pp	23.9%	22.8%
35–64	39,080 ±1,580	38.3% ±1.5 pp	38.9%	38.0%
65 and older	18,123 ±1,132	17.7% ±1.1 pp	17.9%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 102,114
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
Male	51,510 ±957	50.4% ±0.9 pp	48.9%	49.5%
Female	50,604 ±961	49.6% ±0.9 pp	51.1%	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: 102,114
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
White alone	55,813 ±1,997	54.7% ±2.0 pp	68.6%	61.0%
Black or African American alone	6,473 ±1,111	6.3% ±1.1 pp	6.8%	12.2%
American Indian and Alaska Native alone	191 ±93	0.2% ±0.1 pp	0.2%	0.9%
Asian alone	29,833 ±1,415	29.2% ±1.4 pp	7.3%	6.0%
Native Hawaiian and Other Pacific Islander alone	7 ±14 · low precision	0.0% ±0.0 pp · low precision	0.0%	0.2%
Some other race alone	3,123 ±969	3.1% ±0.9 pp	5.8%	7.1%
Two or more races	6,674 ±1,074	6.5% ±1.1 pp	11.1%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 102,114
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
Not Hispanic or Latino	95,441 ±991	93.5% ±1.0 pp	86.7%	80.7%
Hispanic or Latino	6,673 ±992	6.5% ±1.0 pp	13.3%	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: 45,285
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
Married-couple family	17,163 ±743	37.9% ±1.4 pp	45.9%	46.9%
Other family: male householder, no spouse present	2,202 ±448	4.9% ±1.0 pp	4.7%	5.1%
Other family: female householder, no spouse present	4,158 ±659	9.2% ±1.4 pp	11.9%	12.2%
Nonfamily: householder living alone	16,128 ±1,000	35.6% ±2.1 pp	28.8%	28.7%
Nonfamily: householder not living alone	5,634 ±696	12.4% ±1.5 pp	8.9%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 45,285
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
Households with people under 18	9,514 ±594	21.0% ±1.2 pp	27.9%	29.5%
Households without people under 18	35,771 ±1,240	79.0% ±2.2 pp	72.1%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 45,285
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
One-person nonfamily households	16,128 ±1,000	35.6% ±2.1 pp	28.8%	28.7%
Two-person households	14,257 ±969	31.5% ±2.0 pp	33.3%	33.8%
Three-person households	7,304 ±717	16.1% ±1.5 pp	16.5%	15.3%
Four-person households	4,710 ±491	10.4% ±1.1 pp	13.5%	12.6%
Five-person households	1,799 ±335	4.0% ±0.7 pp	5.2%	5.9%
Six-person households	670 ±211	1.5% ±0.5 pp	1.8%	2.2%
Seven or more people	417 ±155	0.9% ±0.3 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: 102,114
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
Native	68,407 ±1,665	67.0% ±1.6 pp	82.0%	85.9%
Foreign born	33,707 ±1,664	33.0% ±1.6 pp	18.0%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 97,356
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
English only	59,532 ±2,115	61.1% ±2.1 pp	74.9%	77.7%
Spanish	4,081 ±707	4.2% ±0.7 pp	9.7%	13.6%
French, Haitian, or Cajun	1,167 ±421	1.2% ±0.4 pp	1.9%	0.7%
German or other West Germanic	312 ±214 · low precision	0.3% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	925 ±283	1.0% ±0.3 pp	1.0%	0.7%
Other Indo-European	6,707 ±1,435	6.9% ±1.5 pp	6.1%	2.0%
Korean	239 ±165 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	15,100 ±1,438	15.5% ±1.5 pp	2.2%	1.1%
Vietnamese	3,885 ±1,246	4.0% ±1.3 pp	0.7%	0.5%
Tagalog, including Filipino	696 ±332	0.7% ±0.3 pp	0.1%	0.6%
Other Asian and Pacific Island	2,732 ±669	2.8% ±0.7 pp	1.3%	1.1%
Arabic	1,177 ±577	1.2% ±0.6 pp	0.6%	0.5%
Other and unspecified	803 ±283	0.8% ±0.3 pp	1.0%	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: 78,744
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
Less than high school graduate	7,334 ±750	9.3% ±0.9 pp	8.6%	10.4%
High school graduate or equivalency	16,033 ±1,147	20.4% ±1.4 pp	22.6%	26.0%
Some college, no degree	10,239 ±905	13.0% ±1.1 pp	14.1%	19.1%
Associate’s degree	5,542 ±616	7.0% ±0.8 pp	7.5%	8.8%
Bachelor’s degree	22,603 ±1,261	28.7% ±1.5 pp	25.5%	21.6%
Graduate or professional degree	16,993 ±1,128	21.6% ±1.4 pp	21.8%	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: 101,450
Category	Count ± MOE	Share ± MOE (pp)	Massachusetts	U.S.
Same house	85,731 ±1,795	84.5% ±1.8 pp	88.3%	87.7%
Moved within same county	5,574 ±874	5.5% ±0.9 pp	5.6%	6.3%
Moved from a different county in the same state	6,286 ±1,076	6.2% ±1.1 pp	3.0%	3.1%
Moved from a different state	2,745 ±514	2.7% ±0.5 pp	2.2%	2.3%
Moved from abroad	1,114 ±331	1.1% ±0.3 pp	0.9%	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

3.5% of Quincy residents (±0.7 percentage points) had no health insurance coverage when surveyed, compared with 2.6% in Massachusetts and 8.4% nationally. 94.5% 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	Quincy	Massachusetts	U.S.	Compared with Massachusetts
People without health insurance Civilian noninstitutionalized population	3.5% ±0.7 pp	2.6%	8.4%	Higher
Households with a broadband subscription Households	94.5% ±0.9 pp	92.8%	91.0%	Higher
Veterans Civilian population age 18 and older	3.4% ±0.6 pp	4.3%	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 Quincy . 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 Quincy housing and cost context or return to the city profile.