Allen County, Ohio Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 26th-largest in Ohio
The population of Allen County, Ohio is 101,685 as of the 2023 American Community Survey, making it the 26th-largest county in Ohio. The median household income is $62,001, the median home value is $158,400, and the median age is 39.7.
The population of Allen County has declined 5.1% since 2010 (106,342 → 100,866), a -0.38% annualized rate.
101,685
Population
-0.38%
Annual growth
253
People / sq mi
$62,001
Median Income
$158,400
Median Home Value
Allen County covers 403 sq mi of land at 252.6 people per square mile.
About Allen County, OH
What distinguishes Allen County is density: among the most densely settled of US counties, around 253 people per square mile. Allen County is a county in Ohio with a population of 101,685. It ranks #26 among counties in Ohio by population.
Median household income is $62,001, below the US median of $78,538. Poverty runs at 9.8%, below the national 12.4%. Median home value is $158,400, with typical rent around $898.
Roughly 19.9% of adults have a bachelor’s, below the national 35.0%. Most workers commute: only 4.6% work from home, below the national 14.0%, and the average commute runs about 19 minutes each way.
That density explains much of the rest of the profile in Allen County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Allen County Population History (2010-2024)
The county of Allen County had a population of 106,342 in 2010 and 100,866 in 2024, a -5.1% growth over 14 years. The peak was 106,342 in 2010. Average annual growth rate: -0.38%.
100,866
Population (2024)
106,342
Population (2010)
106,342
Peak (2010)
-0.38%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 106,342 |
| 2011 | 105,981 |
| 2012 | 105,251 |
| 2013 | 105,071 |
| 2014 | 104,886 |
| 2015 | 104,141 |
| 2016 | 103,691 |
| 2017 | 103,173 |
| 2018 | 102,747 |
| 2019 | 102,450 |
| 2020 | 102,137 |
| 2021 | 101,800 |
| 2022 | 101,086 |
| 2023 | 100,851 |
| 2024 | 100,866 |
Race & Ethnicity
| White | 80.9% |
| Black or African American | 10.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.7% |
| Two or More Races | 0.0% |
Age & Sex
39.7
Median Age
50.0%
Female
50.0%
Male
18.7%
Age 65+
Age Distribution
Children (under 15): 19.3% · Seniors (65+): 18.7%
Income & Poverty
| Median household income | $62,001$-7,679 vs state |
| Mean household income | $80,262 |
| Per-capita income | $33,382 |
| Poverty rate | 9.8%+0.6% vs state |
| Unemployment rate | 3.6% |
| Employment-to-population | 57.4% |
Top Industries by Employment
The largest employment sector in Allen County is professional & business services, accounting for 22.9% of workers.
How residents commute
0.5%
Drive alone
1.4%
Carpool
83.4%
Public transit
4.6%
Work from home
18.8 min
Avg commute
Housing
$158,400$-40,800 vs state
Median home value
$898
Median rent
68.3%
Homeownership rate
44,697
Total housing units
91.6%
Occupied
8.4%
Vacant
31.7%
Renter-occupied
Social & access
93.7%
With health insurance
92.5%
With broadband internet
16.3%
Foreign-born
7.7%
Veterans (18+)
15.9%
With a disability
97.3%
Speak language other than English at home
Education
92.4%
High School+
19.9%
Bachelor's+
Largest cities in Ohio
Other counties in Ohio
Part of Ohio
Metro areas in Ohio
County rankings
Frequently Asked Questions
Allen County, Ohio has a population of 101,685 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 26th-largest county in Ohio. Population density is 253 people per square mile.
The population of Allen County has declined 5.1% since 2010 (106,342 → 100,866), a -0.38% annualized rate.
The median household income in Allen County, Ohio is $62,001, with mean (average) household income of $80,262 and per-capita income of $33,382. 9.8% of residents live below the federal poverty level.
In Allen County, the largest racial and ethnic groups are White (80.9%), Black or African American (10.6%), Hispanic or Latino (1.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Allen County, Ohio is 39.7 years. Residents are 50.0% female and 50.0% male.
The median home value in Allen County is $158,400 and median monthly rent is $898. 68.3% of occupied housing units are owner-occupied. The county has 44,697 total housing units, 8.4% of which are vacant.
The largest employment sector in Allen County, Ohio is professional, scientific, and management services, employing 22.9% of workers. The unemployment rate is 3.6%.
Columbus is among the largest cities associated with Allen County, Ohio, with a population of 906,480.
Allen County, OH Climate
Allen County, OH has an average annual temperature of 10.2°C (50°F) and receives about 898 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
10.2°C
Avg Temp
898
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -4° / 25° | 49 mm |
| February | -2° / 28° | 47 mm |
| March | 3° / 38° | 75 mm |
| April | 9° / 49° | 86 mm |
| May | 16° / 60° | 95 mm |
| June | 21° / 69° | 94 mm |
| July | 23° / 73° | 94 mm |
| August | 22° / 71° | 80 mm |
| September | 18° / 65° | 78 mm |
| October | 12° / 53° | 56 mm |
| November | 5° / 42° | 75 mm |
| December | -1° / 31° | 69 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, OH
The most comfortable months to visit Allen County, OH are typically August, June and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -8°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.