Is Franklin County, OH's population growing or shrinking?
Refreshed annually
It grew by 8,900 between 2024 and 2025, the 37th-most among all counties in the US. Changes in population reflect birth and death rates, immigration patterns, regional shifts, and even the overall health of the economy. Franklin County, OH’s 0.66% annual increase was primarily driven by immigration to the state.
In the decade between 2015 and 2025, Franklin County, OH’s population grew by 8.2%.
+8.88K
population change (2024 to 2025)
+0.66%
percent change in population (2024 to 2025)
Since 2000, Franklin County, OH’s population increased 24 out of 25 years. The largest increase occurred between 2016 and 2017, when Franklin County, OH gained 21,200 residents. Its largest decline occurred between 2020 and 2021 when there were 7,300 fewer residents.
Franklin County, OH gained 8,900 residents between 2024 and 2025.
Annual population change, 2001–2025
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What contributes to population change in Franklin County, OH?
A county’s population is influenced by three factors:
- Natural population change: If births outnumber deaths in a given year, natural population growth is positive. If deaths exceed births, it is negative. Between 2024 and 2025 natural population change was positive in Franklin County, OH, with births exceeding deaths by 6,600.
- Immigration: international migration directly into or out of a county: If more people move in than move out, population change from immigration is positive. If more people move out than move in, it’s negative. Between 2024 to 2025, Franklin County, OH’s population change from immigration was positive with about 9,400 more people coming from another country directly to Franklin County, OH than leaving.
- Domestic migration, moving between counties: Between 2024 to 2025, Franklin County, OH’s population change from domestic migration was negative with about 7,200 more people moving to any other county in the US.
Between 2024 and 2025, immigration was the primary driver of population growth in Franklin County, OH.
Components of population change from previous year, 2011–2025
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
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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.
