Franklin County Flag

Franklin County

State:
Ohio
County Seat:
Columbus

Franklin County's estimated 2026 population is 1,391,103 with a growth rate of 1.27% in the past year according to the most recent United States census data. Franklin County is the largest county in Ohio. The 2010 population was 1,166,218 and has seen a growth of 19.28% since that time.

1,391,103
Total Population
2,615
Population Density (mi²)
1
Population Rank (State)
17.4K 1.27%
Annual Population Growth

Franklin County Population

Demographics

Economics and Income Statistics