Franklin County Flag

Franklin County

State:
Missouri
County Seat:
Union

Franklin County's 2026 population is estimated at 108,880, reflecting a 0.75% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Franklin County is the 12th largest county in Missouri. The 2010 population was 101,424 and has grown 7.35% since 2010.

108,880
Total Population
118
Population Density (mi²)
12
Population Rank (State)
812 0.75%
Annual Population Growth

Franklin County Population

Demographics

Economics and Income Statistics