How many people live in Franklin County, OH?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 1.36 million people living in Franklin County, OH. That makes Franklin County the 32nd-most populous county in the US. It is also the largest in Ohio, accounting for 11.4% of the state’s population.
1.36M
population of Franklin County, OH (2024)
11.4%
County share of the Ohio population (2024)
About 1.36 million people lived in Franklin County, OH in 2024.
Population estimates, 2000–2024
What are Franklin County, OH’s age demographics?
About 186,100 Franklin County, OH residents are aged 65 and older in 2024. That represents 13.7% of its population. For comparison, the age group represents 19.1% of Ohio’s population and 18% in the US overall.
Another 311,600 Franklin 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 higher share of Franklin County, OH's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Franklin County, OH’s racial and ethnic demographics?
Non-Hispanic Black or African American residents make up 24.7% of the Franklin County, OH population, higher than the national share of 12.6%. Franklin County, OH also has a larger share of people identifying as non-Hispanic two or more races (3.3%) than the US overall (2.5%).
In contrast, Franklin County’s Hispanic population accounts for 8.2%, below the 20% nationwide, and the non-Hispanic American Indian and Alaska Native population makes up 0.17% of the county, compared with 0.72% 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.
Franklin County, OH has a higher share of a non-Hispanic Black or African American population than Ohio as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Franklin County, OH is Columbus with about 905,900 residents in 2024.
Cities and towns in Franklin County, OH ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Columbus (pt.) | 905,883 |
| 2. | Grove City (pt.) | 44,013 |
| 3. | Dublin (pt.) | 40,731 |
| 4. | Upper Arlington | 36,140 |
| 5. | Hilliard (pt.) | 35,561 |
| 6. | Gahanna | 35,544 |
| 7. | Reynoldsburg (pt.) | 29,980 |
| 8. | Westerville (pt.) | 29,250 |
| 9. | Whitehall | 19,940 |
| 10. | Prairie | 17,028 |
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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.
