How many people live in Gallia County, OH?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 28,900 people living in Gallia County, OH. That makes Gallia County the 74th-most populous county in Ohio. It is home to 0.24% of people living in the state.
28.9K
population of Gallia County, OH (2024)
0.24%
County share of the Ohio population (2024)
About 28,900 people lived in Gallia County, OH in 2024.
Population estimates, 2000–2024
What are Gallia County, OH’s age demographics?
About 6,000 Gallia County, OH residents are aged 65 and older in 2024. That represents 20.9% of its population. For comparison, the age group represents 19.1% of Ohio’s population and 18% in the US overall.
Another 6,700 Gallia County residents, or 23% of the population, were children under 18. For comparison, the age group represents 21.7% of Ohio’s population and 21.6% in the US overall.
A lower share of Gallia County, OH's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Gallia County, OH’s racial and ethnic demographics?
Non-Hispanic white residents make up 93.5% of the Gallia County, OH population, higher than the national share of 57.5%. Gallia County, OH also has a larger share of people identifying as non-Hispanic Native Hawaiian and other Pacific Islander (0.25%) than the US overall (0.2%).
In contrast, Gallia County’s Hispanic population accounts for 1.2%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 2.1% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Gallia County, OH has a higher share of a non-Hispanic white population than Ohio as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Gallia County, OH is Green with about 5,300 residents in 2024.
Cities and towns in Gallia County, OH ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Green | 5,318 |
| 2. | Springfield | 3,416 |
| 3. | Gallipolis | 3,282 |
| 4. | Addison | 2,089 |
| 5. | Clay | 1,726 |
| 6. | Perry | 1,494 |
| 7. | Morgan | 1,337 |
| 8. | Walnut | 978 |
| 9. | Harrison | 970 |
| 10. | Ohio | 913 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
