Wilmington, Delaware demographics

Wilmington, DE demographics: median age 37.0; 33.1% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Wilmington city, Delaware · Incorporated city · GEOID 1077580. The survey estimates a population of 71,727 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Wilmington is 37.0 years, with a 90% margin of error of 1.3 years. There are 31,655 households (±936). 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	37.0 ±1.3	41.6 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 71,727
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
Under 18	15,058 ±1,084	21.0% ±1.5 pp	20.7%	22.0%
18–34	18,807 ±1,203	26.2% ±1.7 pp	21.1%	22.8%
35–64	26,779 ±1,422	37.3% ±2.0 pp	37.6%	38.0%
65 and older	11,083 ±830	15.5% ±1.2 pp	20.6%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 71,727
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
Male	33,738 ±1,137	47.0% ±1.6 pp	48.4%	49.5%
Female	37,989 ±1,130	53.0% ±1.6 pp	51.6%	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: 71,727
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
White alone	22,079 ±1,243	30.8% ±1.7 pp	59.9%	61.0%
Black or African American alone	37,465 ±1,672	52.2% ±2.3 pp	21.9%	12.2%
American Indian and Alaska Native alone	215 ±209 · low precision	0.3% ±0.3 pp · low precision	0.4%	0.9%
Asian alone	1,196 ±327	1.7% ±0.5 pp	4.3%	6.0%
Native Hawaiian and Other Pacific Islander alone	12 ±16 · low precision	0.0% ±0.0 pp · low precision	0.0%	0.2%
Some other race alone	5,311 ±988	7.4% ±1.4 pp	4.6%	7.1%
Two or more races	5,449 ±911	7.6% ±1.3 pp	8.8%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 71,727
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
Not Hispanic or Latino	63,195 ±979	88.1% ±1.4 pp	89.0%	80.7%
Hispanic or Latino	8,532 ±973	11.9% ±1.4 pp	11.0%	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: 31,655
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
Married-couple family	6,893 ±560	21.8% ±1.6 pp	47.2%	46.9%
Other family: male householder, no spouse present	1,699 ±323	5.4% ±1.0 pp	4.7%	5.1%
Other family: female householder, no spouse present	6,436 ±552	20.3% ±1.6 pp	13.2%	12.2%
Nonfamily: householder living alone	14,402 ±1,097	45.5% ±3.2 pp	28.5%	28.7%
Nonfamily: householder not living alone	2,225 ±411	7.0% ±1.3 pp	6.3%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 31,655
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
Households with people under 18	7,470 ±437	23.6% ±1.2 pp	27.4%	29.5%
Households without people under 18	24,185 ±1,058	76.4% ±2.5 pp	72.6%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 31,655
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
One-person nonfamily households	14,402 ±1,097	45.5% ±3.2 pp	28.5%	28.7%
Two-person households	8,260 ±752	26.1% ±2.2 pp	35.9%	33.8%
Three-person households	4,319 ±490	13.6% ±1.5 pp	15.4%	15.3%
Four-person households	3,031 ±433	9.6% ±1.3 pp	12.3%	12.6%
Five-person households	952 ±210	3.0% ±0.7 pp	4.9%	5.9%
Six-person households	370 ±185 · low precision	1.2% ±0.6 pp · low precision	2.0%	2.2%
Seven or more people	321 ±116	1.0% ±0.4 pp	1.1%	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: 71,727
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
Native	64,875 ±1,091	90.4% ±1.5 pp	89.3%	85.9%
Foreign born	6,852 ±1,095	9.6% ±1.5 pp	10.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 67,777
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
English only	57,800 ±1,259	85.3% ±1.7 pp	84.9%	77.7%
Spanish	6,353 ±853	9.4% ±1.3 pp	7.9%	13.6%
French, Haitian, or Cajun	438 ±298 · low precision	0.6% ±0.4 pp · low precision	1.0%	0.7%
German or other West Germanic	158 ±106 · low precision	0.2% ±0.2 pp · low precision	0.5%	0.5%
Russian, Polish, or other Slavic	225 ±107	0.3% ±0.2 pp	0.4%	0.7%
Other Indo-European	659 ±217	1.0% ±0.3 pp	1.7%	2.0%
Korean	111 ±75 · low precision	0.2% ±0.1 pp · low precision	0.2%	0.3%
Chinese, including Mandarin and Cantonese	315 ±164 · low precision	0.5% ±0.2 pp · low precision	0.8%	1.1%
Vietnamese	49 ±61 · low precision	0.1% ±0.1 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	0 ±30 · low precision	0.0% ±0.0 pp · low precision	0.3%	0.6%
Other Asian and Pacific Island	114 ±118 · low precision	0.2% ±0.2 pp · low precision	0.8%	1.1%
Arabic	415 ±298 · low precision	0.6% ±0.4 pp · low precision	0.3%	0.5%
Other and unspecified	1,140 ±655 · low precision	1.7% ±1.0 pp · low precision	1.1%	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: 50,535
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
Less than high school graduate	6,039 ±679	12.0% ±1.3 pp	8.3%	10.4%
High school graduate or equivalency	15,117 ±1,003	29.9% ±1.9 pp	28.8%	26.0%
Some college, no degree	9,479 ±981	18.8% ±1.9 pp	18.8%	19.1%
Associate’s degree	3,172 ±558	6.3% ±1.1 pp	8.3%	8.8%
Bachelor’s degree	8,680 ±933	17.2% ±1.8 pp	20.4%	21.6%
Graduate or professional degree	8,048 ±780	15.9% ±1.5 pp	15.3%	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: 70,973
Category	Count ± MOE	Share ± MOE (pp)	Delaware	U.S.
Same house	60,565 ±1,339	85.3% ±1.9 pp	89.3%	87.7%
Moved within same county	5,966 ±955	8.4% ±1.3 pp	5.3%	6.3%
Moved from a different county in the same state	1,376 ±303	1.9% ±0.4 pp	1.1%	3.1%
Moved from a different state	2,648 ±527	3.7% ±0.7 pp	3.9%	2.3%
Moved from abroad	418 ±217 · low precision	0.6% ±0.3 pp · low precision	0.5%	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

7.7% of Wilmington residents (±1.1 percentage points) had no health insurance coverage when surveyed, compared with 6.3% in Delaware and 8.4% nationally. 87.1% 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	Wilmington	Delaware	U.S.	Compared with Delaware
People without health insurance Civilian noninstitutionalized population	7.7% ±1.1 pp	6.3%	8.4%	Higher
Households with a broadband subscription Households	87.1% ±1.5 pp	92.4%	91.0%	Lower
Veterans Civilian population age 18 and older	4.7% ±1.0 pp	7.4%	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 Wilmington . 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 Wilmington housing and cost context or return to the city profile.