Duncanville, Texas demographics

Duncanville, TX demographics: median age 36.2; 25.2% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Duncanville city, Texas · Incorporated city · GEOID 4821628. The survey estimates a population of 39,683 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Duncanville is 36.2 years, with a 90% margin of error of 1.8 years. There are 13,215 households (±506). 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	36.2 ±1.8	35.6 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 39,683
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Under 18	11,043 ±936	27.8% ±2.4 pp	25.0%	22.0%
18–34	8,125 ±837	20.5% ±2.1 pp	24.2%	22.8%
35–64	13,948 ±1,156	35.1% ±2.9 pp	37.4%	38.0%
65 and older	6,567 ±622	16.5% ±1.6 pp	13.4%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 39,683
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Male	18,916 ±858	47.7% ±2.2 pp	49.9%	49.5%
Female	20,767 ±865	52.3% ±2.2 pp	50.1%	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: 39,683
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
White alone	11,651 ±1,261	29.4% ±3.2 pp	48.5%	61.0%
Black or African American alone	11,690 ±1,747	29.5% ±4.4 pp	12.2%	12.2%
American Indian and Alaska Native alone	416 ±273 · low precision	1.0% ±0.7 pp · low precision	0.7%	0.9%
Asian alone	521 ±259	1.3% ±0.7 pp	5.6%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±31 · low precision	0.0% ±0.1 pp · low precision	0.1%	0.2%
Some other race alone	6,652 ±1,168	16.8% ±2.9 pp	9.3%	7.1%
Two or more races	8,753 ±1,266	22.1% ±3.2 pp	23.5%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 39,683
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Not Hispanic or Latino	22,092 ±1,425	55.7% ±3.6 pp	60.3%	80.7%
Hispanic or Latino	17,591 ±1,423	44.3% ±3.6 pp	39.7%	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: 13,215
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Married-couple family	6,092 ±437	46.1% ±2.8 pp	48.9%	46.9%
Other family: male householder, no spouse present	780 ±367	5.9% ±2.8 pp	5.4%	5.1%
Other family: female householder, no spouse present	2,770 ±420	21.0% ±3.1 pp	13.4%	12.2%
Nonfamily: householder living alone	3,182 ±472	24.1% ±3.5 pp	26.2%	28.7%
Nonfamily: householder not living alone	391 ±138	3.0% ±1.0 pp	6.0%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 13,215
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Households with people under 18	4,915 ±396	37.2% ±2.6 pp	34.7%	29.5%
Households without people under 18	8,300 ±737	62.8% ±5.0 pp	65.3%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 13,215
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
One-person nonfamily households	3,182 ±472	24.1% ±3.5 pp	26.2%	28.7%
Two-person households	3,583 ±459	27.1% ±3.3 pp	31.4%	33.8%
Three-person households	2,514 ±506	19.0% ±3.8 pp	16.3%	15.3%
Four-person households	2,049 ±339	15.5% ±2.5 pp	14.2%	12.6%
Five-person households	986 ±227	7.5% ±1.7 pp	7.3%	5.9%
Six-person households	421 ±154	3.2% ±1.2 pp	2.9%	2.2%
Seven or more people	480 ±135	3.6% ±1.0 pp	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: 39,683
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Native	33,204 ±836	83.7% ±2.1 pp	82.4%	85.9%
Foreign born	6,479 ±837	16.3% ±2.1 pp	17.6%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 37,457
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
English only	23,562 ±1,183	62.9% ±3.1 pp	64.9%	77.7%
Spanish	12,912 ±1,216	34.5% ±3.2 pp	28.1%	13.6%
French, Haitian, or Cajun	130 ±126 · low precision	0.3% ±0.3 pp · low precision	0.3%	0.7%
German or other West Germanic	0 ±31 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	25 ±48 · low precision	0.1% ±0.1 pp · low precision	0.2%	0.7%
Other Indo-European	123 ±100 · low precision	0.3% ±0.3 pp · low precision	1.7%	2.0%
Korean	38 ±53 · low precision	0.1% ±0.1 pp · low precision	0.2%	0.3%
Chinese, including Mandarin and Cantonese	5 ±14 · low precision	0.0% ±0.0 pp · low precision	0.7%	1.1%
Vietnamese	0 ±31 · low precision	0.0% ±0.1 pp · low precision	0.9%	0.5%
Tagalog, including Filipino	95 ±110 · low precision	0.3% ±0.3 pp · low precision	0.3%	0.6%
Other Asian and Pacific Island	19 ±31 · low precision	0.1% ±0.1 pp · low precision	1.1%	1.1%
Arabic	194 ±227 · low precision	0.5% ±0.6 pp · low precision	0.4%	0.5%
Other and unspecified	354 ±270 · low precision	0.9% ±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: 25,001
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Less than high school graduate	4,731 ±656	18.9% ±2.5 pp	14.0%	10.4%
High school graduate or equivalency	6,809 ±894	27.2% ±3.4 pp	24.3%	26.0%
Some college, no degree	5,048 ±644	20.2% ±2.5 pp	20.1%	19.1%
Associate’s degree	2,107 ±361	8.4% ±1.4 pp	7.7%	8.8%
Bachelor’s degree	4,125 ±516	16.5% ±2.0 pp	21.5%	21.6%
Graduate or professional degree	2,181 ±456	8.7% ±1.8 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: 39,347
Category	Count ± MOE	Share ± MOE (pp)	Texas	U.S.
Same house	36,629 ±774	93.1% ±1.9 pp	86.0%	87.7%
Moved within same county	2,190 ±747	5.6% ±1.9 pp	7.4%	6.3%
Moved from a different county in the same state	239 ±115	0.6% ±0.3 pp	3.9%	3.1%
Moved from a different state	215 ±134 · low precision	0.5% ±0.3 pp · low precision	2.0%	2.3%
Moved from abroad	74 ±80 · low precision	0.2% ±0.2 pp · low precision	0.8%	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

22.2% of Duncanville residents (±2.8 percentage points) had no health insurance coverage when surveyed, compared with 17.1% in Texas 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	Duncanville	Texas	U.S.	Compared with Texas
People without health insurance Civilian noninstitutionalized population	22.2% ±2.8 pp	17.1%	8.4%	Higher
Households with a broadband subscription Households	93.1% ±5.0 pp	91.4%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	6.1% ±1.1 pp	6.2%	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 Duncanville . 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 Duncanville housing and cost context or return to the city profile.