Allen County, Kentucky Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 54th-largest in Kentucky
The population of Allen County, Kentucky is 21,029 as of the 2023 American Community Survey, making it the 54th-largest county in Kentucky. The median household income is $59,029, the median home value is $176,300, and the median age is 40.7.
The population of Allen County has grown 10.1% since 2010 (20,023 → 22,037), a +0.69% annualized rate.
21,029
Population
+0.69%
Annual growth
61
People / sq mi
$59,029
Median Income
$176,300
Median Home Value
Allen County covers 344 sq mi of land at 61.2 people per square mile.
About Allen County, KY
Allen County is a county in Kentucky with a population of 21,029. It ranks #54 among counties in Kentucky by population. The median age is 40.7, older than the national median. The population is 49.5% male and 50.5% female.
The median household income in Allen County is $59,029, below the US median of $74,580. 11.2% of residents live below the federal poverty level. Home values sit at a median of $176,300, with monthly rent averaging $750. The homeownership rate of 76.7% is higher than the national rate of 64.8%.
Educational attainment in Allen County reflects 17.4% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.4% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 26.5 minutes each way.
Allen County Population History (2010-2024)
The county of Allen County had a population of 20,023 in 2010 and 22,037 in 2024, a 10.1% growth over 14 years. The peak was 22,037 in 2024. Average annual growth rate: 0.70%.
22,037
Population (2024)
20,023
Population (2010)
22,037
Peak (2024)
0.70%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 20,023 |
| 2011 | 20,164 |
| 2012 | 20,220 |
| 2013 | 20,304 |
| 2014 | 20,482 |
| 2015 | 20,655 |
| 2016 | 20,706 |
| 2017 | 20,891 |
| 2018 | 21,104 |
| 2019 | 21,320 |
| 2020 | 20,572 |
| 2021 | 20,833 |
| 2022 | 21,246 |
| 2023 | 21,779 |
| 2024 | 22,037 |
Race & Ethnicity
| White | 95.4% |
| Black or African American | 0.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.1% |
| Two or More Races | 0.0% |
Age & Sex
40.7
Median Age
50.5%
Female
49.5%
Male
17.6%
Age 65+
Age Distribution
Children (under 15): 19.3% · Seniors (65+): 17.6%
Income & Poverty
| Median household income | $59,029$-3,388 vs state |
| Mean household income | $77,190 |
| Per-capita income | $30,206 |
| Poverty rate | 11.2%-0.6% vs state |
| Unemployment rate | 4.4% |
| Employment-to-population | 54.2% |
Top Industries by Employment
The largest employment sector in Allen County is professional & business services, accounting for 19.1% of workers.
How residents commute
0.5%
Drive alone
3.9%
Carpool
74.3%
Public transit
9.4%
Work from home
26.5 min
Avg commute
Housing
$176,300$-16,000 vs state
Median home value
$750
Median rent
76.7%
Homeownership rate
9,261
Total housing units
84.8%
Occupied
15.2%
Vacant
23.3%
Renter-occupied
Social & access
90.2%
With health insurance
87.6%
With broadband internet
32.1%
Foreign-born
7.4%
Veterans (18+)
18.6%
With a disability
91.0%
Speak language other than English at home
Education
85.0%
High School+
17.4%
Bachelor's+
Largest cities in Kentucky
Other counties in Kentucky
Part of Kentucky
Metro areas in Kentucky
County rankings
Frequently Asked Questions
Allen County, Kentucky has a population of 21,029 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 54th-largest county in Kentucky. Population density is 61 people per square mile.
The population of Allen County has grown 10.1% since 2010 (20,023 → 22,037), a +0.69% annualized rate.
The median household income in Allen County, Kentucky is $59,029, with mean (average) household income of $77,190 and per-capita income of $30,206. 11.2% of residents live below the federal poverty level.
In Allen County, the largest racial and ethnic groups are White (95.4%), Hispanic or Latino (2.1%), Black or African American (0.5%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Allen County, Kentucky is 40.7 years. Residents are 50.5% female and 49.5% male.
The median home value in Allen County is $176,300 and median monthly rent is $750. 76.7% of occupied housing units are owner-occupied. The county has 9,261 total housing units, 15.2% of which are vacant.
The largest employment sector in Allen County, Kentucky is professional, scientific, and management services, employing 19.1% of workers. The unemployment rate is 4.4%.
Louisville/Jefferson County is among the largest cities associated with Allen County, Kentucky, with a population of 627,210.
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Statewide data for Kentucky
Population, race, income, age, and trends across Kentucky
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.