Demographics of Seaford city, Delaware

Seaford city, Delaware had 9,165 people on July 1, 2025, by the Census Bureau’s estimate: +1,183 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Seaford city, in four figures

9,165
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 8,485 ±20.; +14.8%
Change since July 2020: +1,183 people.; 41.1 ±5.5
Median age: ACS 2020–⁠2024.; $54,016 ±$11,620
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a place, so the change is the difference between one July estimate and the next.

Seaford city, Delaware's population grew 14.8% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Seaford city, Delaware's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Seaford city, Delaware's population grew 14.8% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Seaford city, Delaware's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	7,982	100.0	100.0
2021	8,248	103.3	100.2
2022	8,526	106.8	100.7
2023	8,758	109.7	101.6
2024	8,981	112.5	102.5
2025	9,165	114.8	103.1

Population of Seaford city, Delaware on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	7,982	—
2021	8,248	+266
2022	8,526	+278
2023	8,758	+232
2024	8,981	+223
2025	9,165	+184

Age, 2020–2024

The median age is 41.1 ±5.5: for men 40.4 ±5.1 and for women 41.8 ±7.1. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Seaford city by age, ACS 2020–2024
Age	People	Share	Delaware	United States
Under 5	404 ±189	4.8% ±2.2	5.3% ±<0.1	5.6% ±<0.1
5 to 17	1,566 ±401	18.5% ±4.7	15.4% ±0.2	16.3% ±<0.1
18 to 24	669 ±221	7.9% ±2.6	8.5% ±0.2	9.1% ±<0.1
25 to 44	2,021 ±424	23.8% ±5.0	24.8% ±0.2	26.9% ±<0.1
45 to 64	2,247 ±429	26.5% ±5.1	25.4% ±0.3	24.8% ±<0.1
65 and over	1,578 ±441	18.6% ±5.2	20.6% ±0.3	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $54,016 ±$11,620, and income per person $29,868 ±$3,541, in 2024 dollars. The median is $84,954 ±$1,251 in Delaware and $80,734 ±$166 in the United States.

Households by income

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Households in Seaford city by income, ACS 2020–2024
Household income	Households	Share	Delaware	United States
Under $25,000	642 ±187	18.3% ±5.1	11.9% ±0.5	14.6% ±<0.1
$25,000 to $49,999	916 ±302	26.1% ±8.3	16.4% ±0.6	16.7% ±<0.1
$50,000 to $74,999	354 to 1,052	20.0% ±9.8	15.9% ±0.5	15.5% ±<0.1
$75,000 to $99,999	648 ±229	18.4% ±6.3	13.5% ±0.5	12.6% ±<0.1
$100,000 to $149,999	312 ±141	8.9% ±3.9	19.0% ±0.6	17.5% ±<0.1
$150,000 to $199,999	26 to 248	0.8% to 7.0%	10.9% ±0.4	9.6% ±<0.1
$200,000 or more	69 to 247	2.0% to 7.0%	12.4% ±0.4	13.4% ±0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Seaford city by age, ACS 2020–2024
Age	Below poverty	Rate	Delaware	United States
All ages	1,543 ±486	18.8% ±5.9	10.4% ±0.4	12.5% ±0.1
Under 18	217 to 773	12.7% to 37.9%	15.0% ±0.9	16.1% ±0.1
18 to 59	772 ±291	17.6% ±6.2	9.6% ±0.4	11.6% ±0.1
60 and over	135 to 417	14.7% ±5.9	8.5% ±0.5	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in Seaford city, ACS 2020–2024
Measure	Seaford city	Delaware	United States
Housing units	3,908 ±284	464,203 ±208	143,775,355 ±10,234
Occupied	90.0% ±3.1	86.6% ±0.4	89.9% ±0.1
Vacant	10.0% ±4.6	13.4% ±0.3	10.1% ±0.1
Owner occupied	49.5% ±7.9	73.0% ±0.6	65.2% ±0.3
Renter occupied	50.5% ±7.0	27.0% ±0.5	34.8% ±0.1
Median home value	$224,300 ±$23,976	$352,000 ±$2,842	$332,700 ±$236
Median gross rent	$1,176 ±$88	$1,401 ±$16	$1,413 ±$2
Median year built	1977 ±7	1987 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Seaford city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Delaware	United States
Hispanic or Latino	515 to 1,607	6.1% to 18.9%	11.0% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	4,154 ±559	49.0% ±6.6	58.1% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	1,897 ±470	22.4% ±5.5	21.4% ±0.2	11.9% ±<0.1
Asian alone, not Hispanic	0 to 223	0% to 2.6%	4.3% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 11	0% to 0.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 18	0% to 0.2%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 70	0% to 0.8%	0.5% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,240 ±456	14.6% ±5.4	4.5% ±0.2	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Seaford city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Delaware	United States
Born in the state	3,882 ±555	45.8% ±6.5	42.9% ±0.4	57.3% ±<0.1
Born in another state	3,737 ±574	44.0% ±6.8	44.7% ±0.5	26.9% ±<0.1
Born a citizen outside the states	33 to 225	0.4% to 2.7%	1.7% ±0.2	1.7% ±<0.1
Born abroad	737 ±332	8.7% ±3.9	10.7% ±0.3	14.1% ±<0.1
Naturalized citizens	132 to 476	1.6% to 5.6%	5.8% ±0.3	7.4% ±<0.1
Not citizens	145 to 721	1.7% to 8.5%	4.9% ±0.3	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Seaford city among the places of Delaware

13th of 21 places of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the Delaware page.

Places of Delaware near Seaford city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Hockessin CDP	13,439 ±1,427
Smyrna town	13,165 ±51
Milford city	12,803 ±37
Pike Creek Valley CDP	12,431 ±1,150
Claymont CDP	8,786 ±850
Seaford city	8,485 ±20
Wilmington Manor CDP	8,214 ±846
North Star CDP	7,834 ±888
Georgetown town	7,660 ±27
Millsboro town	7,424 ±23
Pike Creek CDP	7,129 ±869

Rankings this appears in

No. 1 Places in Delaware by median age
No. 1 Places in Delaware by poverty rate
No. 6 Places in Delaware by foreign-born share
No. 10 Places in Delaware by homeownership rate
No. 12 Places in Delaware by median rent
No. 13 Places in Delaware by median household income

Sources

Census Bureau population estimates — incorporated places and New England towns — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — incorporated places and New England towns and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026