Demographics of Lyon County, Kansas

Lyon County, Kansas had 32,266 people on July 1, 2025, by the Census Bureau’s estimate: +156 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.

Lyon County, in four figures

32,266
Population: July 1, 2025, Vintage 2025 estimate.; +0.5%
Change since July 2020: +156 people.; 33.1 ±0.6
Median age: ACS 2020–⁠2024.; $59,912 ±$4,163
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.

Lyon County, Kansas's population grew 0.5% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Lyon 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

Lyon County, Kansas's population grew 0.5% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Lyon 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	32,110	100.0	100.0
2021	32,025	99.7	100.2
2022	32,007	99.7	100.7
2023	32,205	100.3	101.6
2024	32,351	100.8	102.5
2025	32,266	100.5	103.1

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Population of Lyon 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	32,110	−70	−11	+4	−64
2021	32,025	−85	−12	+70	−163
2022	32,007	−18	+18	+168	−197
2023	32,205	+198	+27	+203	−27
2024	32,351	+146	+42	+205	−100
2025	32,266	−85	+40	+99	−223

Age, 2020–2024

The median age is 33.1 ±0.6: for men 33.0 ±0.7 and for women 33.1 ±1.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Lyon County by age, ACS 2020–2024
Age	People	Share	Kansas	United States
Under 5	1,823 ±65	5.7% ±0.2	6.0% ±<0.1	5.6% ±<0.1
5 to 17	5,310 ±329	16.5% ±1.0	17.8% ±0.1	16.3% ±<0.1
18 to 24	5,444 ±538	16.9% ±1.7	10.2% ±0.1	9.1% ±<0.1
25 to 44	7,708 ±384	23.9% ±1.2	25.8% ±0.1	26.9% ±<0.1
45 to 64	6,705 ±388	20.8% ±1.2	23.3% ±0.1	24.8% ±<0.1
65 and over	5,196 ±382	16.1% ±1.2	17.0% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $59,912 ±$4,163, and income per person $30,158 ±$1,212, in 2024 dollars. The median is $74,275 ±$475 in Kansas and $80,734 ±$166 in the United States.

Households by income

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Households in Lyon County by income, ACS 2020–2024
Household income	Households	Share	Kansas	United States
Under $25,000	2,319 ±354	17.2% ±2.6	13.9% ±0.3	14.6% ±<0.1
$25,000 to $49,999	3,284 ±421	24.4% ±3.1	18.9% ±0.3	16.7% ±<0.1
$50,000 to $74,999	2,977 ±429	22.1% ±3.1	17.7% ±0.3	15.5% ±<0.1
$75,000 to $99,999	1,960 ±287	14.5% ±2.1	13.5% ±0.3	12.6% ±<0.1
$100,000 to $149,999	1,846 ±266	13.7% ±1.9	17.7% ±0.3	17.5% ±<0.1
$150,000 to $199,999	545 ±123	4.0% ±0.9	8.8% ±0.2	9.6% ±<0.1
$200,000 or more	550 ±132	4.1% ±1.0	9.6% ±0.2	13.4% ±0.1

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 Lyon County by age, ACS 2020–2024
Age	Below poverty	Rate	Kansas	United States
All ages	4,564 ±612	14.6% ±2.0	11.3% ±0.2	12.5% ±0.1
Under 18	1,149 ±283	16.3% ±3.9	13.1% ±0.4	16.1% ±0.1
18 to 59	2,873 ±381	16.8% ±2.1	11.5% ±0.2	11.6% ±0.1
60 and over	542 ±147	7.7% ±2.1	9.0% ±0.3	11.0% ±<0.1

Housing, 2020–2024

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Housing in Lyon County, ACS 2020–2024
Measure	Lyon County	Kansas	United States
Housing units	15,027 ±76	1,293,635 ±880	143,775,355 ±10,234
Occupied	89.7% ±2.0	90.8% ±0.3	89.9% ±0.1
Vacant	10.3% ±1.9	9.2% ±0.3	10.1% ±0.1
Owner occupied	57.9% ±2.6	67.2% ±0.4	65.2% ±0.3
Renter occupied	42.1% ±2.9	32.8% ±0.3	34.8% ±0.1
Median home value	$150,600 ±$7,373	$217,200 ±$1,343	$332,700 ±$236
Median gross rent	$817 ±$34	$1,060 ±$7	$1,413 ±$2
Median year built	1970 ±2	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

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People in Lyon County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Kansas	United States
Hispanic or Latino	7,780 ±0	24.2% ±<0.1	13.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	21,973 ±68	68.3% ±0.2	72.7% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	452 ±158	1.4% ±0.5	5.2% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	597 ±140	1.9% ±0.4	2.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	18 to 110	0.1% to 0.3%	0.4% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 10	0% to < 0.1%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 100	0% to 0.3%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,269 ±212	3.9% ±0.7	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).

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People in Lyon County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Kansas	United States
Born in the state	21,192 ±728	65.8% ±2.3	59.2% ±0.3	57.3% ±<0.1
Born in another state	7,252 ±626	22.5% ±1.9	32.4% ±0.2	26.9% ±<0.1
Born a citizen outside the states	75 to 351	0.2% to 1.1%	1.1% ±<0.1	1.7% ±<0.1
Born abroad	3,529 ±382	11.0% ±1.2	7.4% ±0.1	14.1% ±<0.1
Naturalized citizens	1,169 ±293	3.6% ±0.9	3.2% ±0.1	7.4% ±<0.1
Not citizens	2,360 ±416	7.3% ±1.3	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%.

Lyon County among the counties of Kansas

18th of 105 by population, July 2025. Every one is listed on the Kansas page.

Counties of Kansas near Lyon County in population, July 2025
County	July 2025	Change since 2020
Geary County	36,338	−1.2%
Miami County	36,240	+5.9%
Cowley County	34,382	−0.4%
Ford County	33,993	−0.6%
Harvey County	33,580	−1.2%
Lyon County	32,266	+0.5%
Montgomery County	30,177	−3.9%
McPherson County	30,064	−0.4%
Ellis County	29,075	+0.4%
Pottawatomie County	27,186	+6.9%
Franklin County	26,299	+1.1%

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