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 defined demographically by education — 17.4% of adults hold a bachelor’s degree, below the national average. Allen County is a county in Kentucky with a population of 21,029.
Median household income is $59,029, below the US median of $78,538. The poverty rate is 11.2%, below the national 12.4%. The typical home is valued at $176,300, with typical rent around $750.
Fewer adults hold degrees here than in most comparable places — 17.4%, below the national 35.0%. Remote work is below the national 14.0% at 9.4%, and the average commute runs about 27 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.
Allen County, KY Climate
Allen County, KY has an average annual temperature of 13.9°C (57°F) and receives about 1321 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
13.9°C
Avg Temp
1321
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 1° / 35° | 96 mm |
| February | 4° / 39° | 106 mm |
| March | 9° / 48° | 129 mm |
| April | 14° / 57° | 111 mm |
| May | 18° / 65° | 133 mm |
| June | 23° / 73° | 114 mm |
| July | 25° / 77° | 119 mm |
| August | 24° / 76° | 96 mm |
| September | 21° / 70° | 96 mm |
| October | 15° / 58° | 79 mm |
| November | 9° / 48° | 115 mm |
| December | 4° / 39° | 127 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Allen County, KY
The most comfortable months to visit Allen County, KY are typically September, June and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 31°C high). The coldest is January (near -4°C low). May is usually the wettest month.
Where to stay near Allen County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.