Demographics of Seward County, Kansas

Seward County, Kansas had 21,073 people on July 1, 2025, by the Census Bureau’s estimate: −784 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Seward County, in four figures

21,073
Population: July 1, 2025, Vintage 2025 estimate.; −3.6%
Change since July 2020: −784 people.; 31.0 ±0.7
Median age: ACS 2020–⁠2024.; $63,827 ±$8,322
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Seward County, Kansas's population shrank 3.6% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Seward County, Kansas'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).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Seward County, Kansas's population shrank 3.6% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Seward County, Kansas'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	21,857	100.0	100.0
2021	21,764	99.6	100.2
2022	21,351	97.7	100.7
2023	21,155	96.8	101.6
2024	21,137	96.7	102.5
2025	21,073	96.4	103.1

3 more columns on a wider screen

Population of Seward County, Kansas on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	21,857	−107	+58	+1	−153
2021	21,764	−93	+197	+24	−303
2022	21,351	−413	+206	+41	−693
2023	21,155	−196	+205	+113	−527
2024	21,137	−18	+198	+152	−375
2025	21,073	−64	+205	+7	−276

Age, 2020–2024

The median age is 31.0 ±0.7: for men 30.9 ±1.0 and for women 31.1 ±0.8. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

2 more columns on a wider screen

People in Seward County by age, ACS 2020–2024
Age	People	Share	Kansas	United States
Under 5	1,818 ±103	8.5% ±0.5	6.0% ±<0.1	5.6% ±<0.1
5 to 17	4,695 ±492	21.9% ±2.3	17.8% ±0.1	16.3% ±<0.1
18 to 24	2,371 ±340	11.0% ±1.6	10.2% ±0.1	9.1% ±<0.1
25 to 44	5,633 ±382	26.2% ±1.8	25.8% ±0.1	26.9% ±<0.1
45 to 64	4,669 ±437	21.7% ±2.0	23.3% ±0.1	24.8% ±<0.1
65 and over	2,300 ±312	10.7% ±1.5	17.0% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $63,827 ±$8,322, and income per person $30,152 ±$2,589, in 2024 dollars. The median is $74,275 ±$475 in Kansas and $80,734 ±$166 in the United States.

Households by income

2 more columns on a wider screen

Households in Seward County by income, ACS 2020–2024
Household income	Households	Share	Kansas	United States
Under $25,000	746 ±247	10.3% ±3.4	13.9% ±0.3	14.6% ±<0.1
$25,000 to $49,999	2,270 ±442	31.3% ±6.0	18.9% ±0.3	16.7% ±<0.1
$50,000 to $74,999	1,070 ±242	14.7% ±3.3	17.7% ±0.3	15.5% ±<0.1
$75,000 to $99,999	1,162 ±267	16.0% ±3.6	13.5% ±0.3	12.6% ±<0.1
$100,000 to $149,999	1,171 ±292	16.1% ±4.0	17.7% ±0.3	17.5% ±<0.1
$150,000 to $199,999	513 ±245	7.1% ±3.4	8.8% ±0.2	9.6% ±<0.1
$200,000 or more	155 to 495	2.1% to 6.8%	9.6% ±0.2	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).

2 more columns on a wider screen

Poverty rate in Seward County by age, ACS 2020–2024
Age	Below poverty	Rate	Kansas	United States
All ages	2,581 ±764	12.2% ±3.6	11.3% ±0.2	12.5% ±0.1
Under 18	1,086 ±402	16.8% ±6.0	13.1% ±0.4	16.1% ±0.1
18 to 59	1,173 ±358	10.6% ±3.2	11.5% ±0.2	11.6% ±0.1
60 and over	322 ±126	9.1% ±3.4	9.0% ±0.3	11.0% ±<0.1

Housing, 2020–2024

1 more column on a wider screen

Housing in Seward County, ACS 2020–2024
Measure	Seward County	Kansas	United States
Housing units	8,308 ±33	1,293,635 ±880	143,775,355 ±10,234
Occupied	87.3% ±3.1	90.8% ±0.3	89.9% ±0.1
Vacant	12.7% ±3.1	9.2% ±0.3	10.1% ±0.1
Owner occupied	61.8% ±5.5	67.2% ±0.4	65.2% ±0.3
Renter occupied	38.2% ±5.6	32.8% ±0.3	34.8% ±0.1
Median home value	$136,500 ±$21,591	$217,200 ±$1,343	$332,700 ±$236
Median gross rent	$905 ±$62	$1,060 ±$7	$1,413 ±$2
Median year built	1973 ±3	1976 ±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

2 more columns on a wider screen

People in Seward County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Kansas	United States
Hispanic or Latino	14,486 ±0	67.4% ±<0.1	13.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	5,392 ±94	25.1% ±0.4	72.7% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	624 ±184	2.9% ±0.9	5.2% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	513 ±52	2.4% ±0.2	2.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	4 to 64	< 0.1% to 0.3%	0.4% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 21	0% to 0.1%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 23	0% to 0.1%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	212 to 646	1.0% to 3.0%	4.8% ±0.1	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).

2 more columns on a wider screen

People in Seward County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Kansas	United States
Born in the state	10,400 ±730	48.4% ±3.4	59.2% ±0.3	57.3% ±<0.1
Born in another state	4,602 ±602	21.4% ±2.8	32.4% ±0.2	26.9% ±<0.1
Born a citizen outside the states	0 to 424	0% to 2.0%	1.1% ±<0.1	1.7% ±<0.1
Born abroad	6,290 ±505	29.3% ±2.4	7.4% ±0.1	14.1% ±<0.1
Naturalized citizens	2,801 ±428	13.0% ±2.0	3.2% ±0.1	7.4% ±<0.1
Not citizens	3,489 ±561	16.2% ±2.6	4.2% ±0.1	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%.

Seward County among the counties of Kansas

26th of 105 by population, July 2025. Every one is listed on the Kansas page.

Counties of Kansas near Seward County in population, July 2025
County	July 2025	Change since 2020
Ellis County	29,075	+0.4%
Pottawatomie County	27,186	+6.9%
Franklin County	26,299	+1.1%
Barton County	24,790	−2.5%
Sumner County	22,312	−0.1%
Seward County	21,073	−3.6%
Labette County	19,685	−2.4%
Cherokee County	19,105	−1.0%
Dickinson County	18,637	+1.4%
Jefferson County	18,296	−0.2%
Atchison County	16,172	−0.9%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — 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

Data retrieved September 25, 2026