Miami County Flag

Miami County

State:
Ohio
County Seat:
Troy

Miami County's estimated 2026 population is 114,054 with a growth rate of 0.93% in the past year according to the most recent United States census data. Miami County is the 25th largest county in Ohio. The 2010 population was 102,487 and has seen a growth of 11.29% since that time.

114,054
Total Population
280
Population Density (mi²)
25
Population Rank (State)
1.1K 0.93%
Annual Population Growth

Miami County Population

Demographics

Economics and Income Statistics