Gallia County, Ohio Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 73rd-largest in Ohio
The population of Gallia County, Ohio is 29,162 as of the 2023 American Community Survey, making it the 73rd-largest county in Ohio. The median household income is $56,455, the median home value is $135,000, and the median age is 41.3.
The population of Gallia County has declined 7.0% since 2010 (31,066 → 28,886), a -0.52% annualized rate.
29,162
Population
-0.52%
Annual growth
63
People / sq mi
$56,455
Median Income
$135,000
Median Home Value
Gallia County covers 467 sq mi of land at 62.5 people per square mile.
About Gallia County, OH
In Gallia County, home values do the distinguishing — a median of $135,000. Gallia County is a county in Ohio with a population of 29,162.
The typical household here earns about $56,455, below the US median of $78,538. Poverty runs at 11.6%, below the national 12.4%. Housing is relatively affordable, with a median home value of $135,000, with typical rent around $798.
Degree attainment is on the lower side for US counties: 17.9% of adults hold a bachelor’s degree, below the national 35.0%. Remote work is below the national 14.0% at 6.4%, and the average commute runs about 27 minutes each way.
Gallia County Population History (2010-2024)
The county of Gallia County had a population of 31,066 in 2010 and 28,886 in 2024, a -7.0% growth over 14 years. The peak was 31,066 in 2010. Average annual growth rate: -0.52%.
28,886
Population (2024)
31,066
Population (2010)
31,066
Peak (2010)
-0.52%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 31,066 |
| 2011 | 31,023 |
| 2012 | 30,881 |
| 2013 | 30,684 |
| 2014 | 30,467 |
| 2015 | 30,258 |
| 2016 | 30,213 |
| 2017 | 30,156 |
| 2018 | 29,956 |
| 2019 | 29,850 |
| 2020 | 29,240 |
| 2021 | 29,235 |
| 2022 | 29,014 |
| 2023 | 28,964 |
| 2024 | 28,886 |
Race & Ethnicity
| White | 92.4% |
| Black or African American | 2.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Age & Sex
41.3
Median Age
50.7%
Female
49.3%
Male
19.3%
Age 65+
Age Distribution
Children (under 15): 19.4% · Seniors (65+): 19.3%
Income & Poverty
| Median household income | $56,455$-13,225 vs state |
| Mean household income | $77,599 |
| Per-capita income | $30,683 |
| Poverty rate | 11.6%+2.4% vs state |
| Unemployment rate | 2.0% |
| Employment-to-population | 51.9% |
Top Industries by Employment
The largest employment sector in Gallia County is professional & business services, accounting for 35.0% of workers.
How residents commute
0.5%
Drive alone
1.9%
Carpool
83.4%
Public transit
6.4%
Work from home
26.7 min
Avg commute
Housing
$135,000$-64,200 vs state
Median home value
$798
Median rent
76.4%
Homeownership rate
13,454
Total housing units
84.0%
Occupied
16.0%
Vacant
23.6%
Renter-occupied
Social & access
89.6%
With health insurance
86.9%
With broadband internet
31.1%
Foreign-born
6.7%
Veterans (18+)
19.7%
With a disability
97.1%
Speak language other than English at home
Education
86.9%
High School+
17.9%
Bachelor's+
Largest cities in Ohio
Other counties in Ohio
Part of Ohio
Metro areas in Ohio
County rankings
Frequently Asked Questions
Gallia County, Ohio has a population of 29,162 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 73rd-largest county in Ohio. Population density is 63 people per square mile.
The population of Gallia County has declined 7.0% since 2010 (31,066 → 28,886), a -0.52% annualized rate.
The median household income in Gallia County, Ohio is $56,455, with mean (average) household income of $77,599 and per-capita income of $30,683. 11.6% of residents live below the federal poverty level.
In Gallia County, the largest racial and ethnic groups are White (92.4%), Black or African American (2.0%), Hispanic or Latino (0.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Gallia County, Ohio is 41.3 years. Residents are 50.7% female and 49.3% male.
The median home value in Gallia County is $135,000 and median monthly rent is $798. 76.4% of occupied housing units are owner-occupied. The county has 13,454 total housing units, 16.0% of which are vacant.
The largest employment sector in Gallia County, Ohio is professional, scientific, and management services, employing 35.0% of workers. The unemployment rate is 2.0%.
Columbus is among the largest cities associated with Gallia County, Ohio, with a population of 906,480.
Gallia County, OH Climate
Gallia County, OH has an average annual temperature of 12°C (54°F) and receives about 1061 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
12°C
Avg Temp
1061
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -1° / 31° | 69 mm |
| February | 1° / 34° | 72 mm |
| March | 6° / 43° | 94 mm |
| April | 12° / 53° | 93 mm |
| May | 17° / 62° | 104 mm |
| June | 21° / 70° | 89 mm |
| July | 24° / 74° | 120 mm |
| August | 23° / 73° | 102 mm |
| September | 19° / 67° | 80 mm |
| October | 13° / 55° | 73 mm |
| November | 7° / 45° | 83 mm |
| December | 2° / 36° | 82 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 Gallia County, OH
The most comfortable months to visit Gallia County, OH are typically June, September and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -6°C low). July is usually the wettest month.
Where to stay near Gallia County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.