Allen County, Kansas Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 36th-largest in Kansas
The population of Allen County, Kansas is 12,491 as of the 2023 American Community Survey, making it the 36th-largest county in Kansas. The median household income is $57,618, the median home value is $100,400, and the median age is 41.3.
The population of Allen County has declined 7.0% since 2010 (13,363 → 12,425), a -0.52% annualized rate.
12,491
Population
-0.52%
Annual growth
25
People / sq mi
$57,618
Median Income
$100,400
Median Home Value
Allen County covers 500 sq mi of land at 25.0 people per square mile.
About Allen County, KS
Allen County is a county in Kansas with a population of 12,491. It ranks #36 among counties in Kansas by population. The median age is 41.3, older than the national median. The population is 49.3% male and 50.7% female.
The median household income in Allen County is $57,618, below the US median of $74,580. 8.9% of residents live below the federal poverty level. Home values sit at a median of $100,400, with monthly rent averaging $685. The homeownership rate of 74.5% is higher than the national rate of 64.8%.
Educational attainment in Allen County reflects 21.3% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 5.0% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 19.9 minutes each way.
Allen County Population History (2010-2024)
The county of Allen County had a population of 13,363 in 2010 and 12,425 in 2024, a -7.0% growth over 14 years. The peak was 13,363 in 2010. Average annual growth rate: -0.52%.
12,425
Population (2024)
13,363
Population (2010)
13,363
Peak (2010)
-0.52%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 13,363 |
| 2011 | 13,348 |
| 2012 | 13,304 |
| 2013 | 13,065 |
| 2014 | 12,889 |
| 2015 | 12,680 |
| 2016 | 12,667 |
| 2017 | 12,545 |
| 2018 | 12,500 |
| 2019 | 12,404 |
| 2020 | 12,537 |
| 2021 | 12,506 |
| 2022 | 12,479 |
| 2023 | 12,466 |
| 2024 | 12,425 |
Race & Ethnicity
| White | 91.1% |
| Black or African American | 1.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.6% |
| Two or More Races | 0.0% |
Age & Sex
41.3
Median Age
50.7%
Female
49.3%
Male
20.7%
Age 65+
Age Distribution
Children (under 15): 18.4% · Seniors (65+): 20.7%
Income & Poverty
| Median household income | $57,618$-15,021 vs state |
| Mean household income | $69,378 |
| Per-capita income | $29,176 |
| Poverty rate | 8.9%+1.2% vs state |
| Unemployment rate | 4.1% |
| Employment-to-population | 56.0% |
Top Industries by Employment
The largest employment sector in Allen County is professional & business services, accounting for 26.4% of workers.
How residents commute
0.7%
Drive alone
4.6%
Carpool
77.4%
Public transit
5.0%
Work from home
19.9 min
Avg commute
Housing
$100,400$-103,000 vs state
Median home value
$685
Median rent
74.5%
Homeownership rate
6,077
Total housing units
82.5%
Occupied
17.5%
Vacant
25.5%
Renter-occupied
Social & access
90.4%
With health insurance
91.9%
With broadband internet
17.8%
Foreign-born
7.4%
Veterans (18+)
17.6%
With a disability
96.7%
Speak language other than English at home
Education
93.5%
High School+
21.3%
Bachelor's+
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Part of Kansas
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County rankings
Frequently Asked Questions
Allen County, Kansas has a population of 12,491 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 36th-largest county in Kansas. Population density is 25 people per square mile.
The population of Allen County has declined 7.0% since 2010 (13,363 → 12,425), a -0.52% annualized rate.
The median household income in Allen County, Kansas is $57,618, with mean (average) household income of $69,378 and per-capita income of $29,176. 8.9% of residents live below the federal poverty level.
In Allen County, the largest racial and ethnic groups are White (91.1%), Hispanic or Latino (2.6%), Black or African American (1.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Allen County, Kansas is 41.3 years. Residents are 50.7% female and 49.3% male.
The median home value in Allen County is $100,400 and median monthly rent is $685. 74.5% of occupied housing units are owner-occupied. The county has 6,077 total housing units, 17.5% of which are vacant.
The largest employment sector in Allen County, Kansas is professional, scientific, and management services, employing 26.4% of workers. The unemployment rate is 4.1%.
Wichita is among the largest cities associated with Allen County, Kansas, with a population of 396,488.
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Population, race, income, age, and trends across Kansas
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.