Summerville, South Carolina demographics

Summerville, SC demographics: median age 38.9; 33.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Summerville town, South Carolina · Incorporated town · GEOID 4570270. The survey estimates a population of 51,654 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Summerville is 38.9 years, with a 90% margin of error of 2.1 years. There are 21,228 households (±815). 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	38.9 ±2.1	40.2 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 51,654
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
Under 18	11,801 ±1,008	22.8% ±2.0 pp	21.4%	22.0%
18–34	11,082 ±976	21.5% ±1.9 pp	22.0%	22.8%
35–64	20,401 ±1,264	39.5% ±2.4 pp	37.7%	38.0%
65 and older	8,370 ±805	16.2% ±1.6 pp	18.9%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 51,654
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
Male	24,450 ±754	47.3% ±1.5 pp	48.7%	49.5%
Female	27,204 ±754	52.7% ±1.5 pp	51.3%	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: 51,654
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
White alone	33,712 ±1,380	65.3% ±2.7 pp	63.3%	61.0%
Black or African American alone	10,290 ±1,050	19.9% ±2.0 pp	24.8%	12.2%
American Indian and Alaska Native alone	195 ±120 · low precision	0.4% ±0.2 pp · low precision	0.4%	0.9%
Asian alone	984 ±312	1.9% ±0.6 pp	1.8%	6.0%
Native Hawaiian and Other Pacific Islander alone	92 ±105 · low precision	0.2% ±0.2 pp · low precision	0.1%	0.2%
Some other race alone	1,612 ±492	3.1% ±1.0 pp	2.8%	7.1%
Two or more races	4,769 ±920	9.2% ±1.8 pp	6.8%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 51,654
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
Not Hispanic or Latino	46,936 ±721	90.9% ±1.4 pp	92.6%	80.7%
Hispanic or Latino	4,718 ±720	9.1% ±1.4 pp	7.4%	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: 21,228
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
Married-couple family	9,883 ±656	46.6% ±2.5 pp	47.1%	46.9%
Other family: male householder, no spouse present	1,030 ±317	4.9% ±1.5 pp	4.5%	5.1%
Other family: female householder, no spouse present	2,764 ±449	13.0% ±2.1 pp	13.4%	12.2%
Nonfamily: householder living alone	6,077 ±793	28.6% ±3.6 pp	29.2%	28.7%
Nonfamily: householder not living alone	1,474 ±347	6.9% ±1.6 pp	5.8%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 21,228
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
Households with people under 18	6,686 ±531	31.5% ±2.2 pp	28.6%	29.5%
Households without people under 18	14,542 ±1,039	68.5% ±4.1 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 21,228
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
One-person nonfamily households	6,077 ±793	28.6% ±3.6 pp	29.2%	28.7%
Two-person households	7,554 ±795	35.6% ±3.5 pp	36.3%	33.8%
Three-person households	3,304 ±539	15.6% ±2.5 pp	15.4%	15.3%
Four-person households	2,589 ±415	12.2% ±1.9 pp	11.6%	12.6%
Five-person households	1,196 ±315	5.6% ±1.5 pp	5.0%	5.9%
Six-person households	353 ±159	1.7% ±0.7 pp	1.7%	2.2%
Seven or more people	155 ±106 · low precision	0.7% ±0.5 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: 51,654
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
Native	48,617 ±613	94.1% ±1.2 pp	94.2%	85.9%
Foreign born	3,037 ±616	5.9% ±1.2 pp	5.8%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 48,357
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
English only	44,441 ±832	91.9% ±1.4 pp	91.6%	77.7%
Spanish	3,016 ±613	6.2% ±1.3 pp	5.3%	13.6%
French, Haitian, or Cajun	131 ±117 · low precision	0.3% ±0.2 pp · low precision	0.3%	0.7%
German or other West Germanic	80 ±59 · low precision	0.2% ±0.1 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	6 ±13 · low precision	0.0% ±0.0 pp · low precision	0.4%	0.7%
Other Indo-European	125 ±84 · low precision	0.3% ±0.2 pp · low precision	0.8%	2.0%
Korean	0 ±33 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.3%
Chinese, including Mandarin and Cantonese	53 ±79 · low precision	0.1% ±0.2 pp · low precision	0.2%	1.1%
Vietnamese	56 ±71 · low precision	0.1% ±0.1 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	284 ±201 · low precision	0.6% ±0.4 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	27 ±43 · low precision	0.1% ±0.1 pp · low precision	0.4%	1.1%
Arabic	0 ±33 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.5%
Other and unspecified	138 ±165 · low precision	0.3% ±0.3 pp · low precision	0.3%	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: 35,858
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
Less than high school graduate	2,355 ±557	6.6% ±1.5 pp	9.9%	10.4%
High school graduate or equivalency	9,101 ±942	25.4% ±2.5 pp	28.2%	26.0%
Some college, no degree	8,408 ±894	23.4% ±2.4 pp	19.8%	19.1%
Associate’s degree	3,982 ±572	11.1% ±1.6 pp	10.0%	8.8%
Bachelor’s degree	7,126 ±759	19.9% ±2.0 pp	19.8%	21.6%
Graduate or professional degree	4,886 ±725	13.6% ±2.0 pp	12.3%	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: 51,034
Category	Count ± MOE	Share ± MOE (pp)	South Carolina	U.S.
Same house	43,179 ±1,209	84.6% ±2.3 pp	87.2%	87.7%
Moved within same county	2,975 ±797	5.8% ±1.6 pp	5.5%	6.3%
Moved from a different county in the same state	2,612 ±707	5.1% ±1.4 pp	3.1%	3.1%
Moved from a different state	2,025 ±633	4.0% ±1.2 pp	3.7%	2.3%
Moved from abroad	243 ±220 · low precision	0.5% ±0.4 pp · low precision	0.4%	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

10.1% of Summerville residents (±1.8 percentage points) had no health insurance coverage when surveyed, compared with 9.6% in South Carolina and 8.4% nationally. 93.1% 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	Summerville	South Carolina	U.S.	Compared with South Carolina
People without health insurance Civilian noninstitutionalized population	10.1% ±1.8 pp	9.6%	8.4%	Not statistically different
Households with a broadband subscription Households	93.1% ±2.5 pp	88.8%	91.0%	Higher
Veterans Civilian population age 18 and older	11.7% ±1.7 pp	8.3%	6.2%	Higher

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