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
Housing cost is the defining feature of Allen County: the median home is valued at $100,400. With 12,491 residents, Allen County is a county in Kansas. It ranks #36 among counties in Kansas by population.
The typical household here earns about $57,618, below the US median of $78,538. Poverty runs at 8.9%, below the national 12.4%. Real estate is inexpensive, with a typical home worth only $100,400, with typical rent around $685.
Roughly 21.3% of adults have a bachelor’s, below the national 35.0%. Most workers commute: only 5.0% work from home, below the national 14.0%, and the average commute runs about 20 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+
Largest cities in Kansas
Other counties in Kansas
Part of Kansas
Metro areas in Kansas
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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Statewide data for Kansas
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.