Montgomery County Flag

Montgomery County

State:
Ohio
County Seat:
Dayton

Montgomery County's estimated 2025 population is 534,440 with a growth rate of 0.06% in the past year according to the most recent United States census data. Montgomery County is the 5th largest county in Ohio. The 2010 population was 535,620 and has seen a growth of -0.22% since that time.

534,440
Total Population
1,159
Population Density (mi²)
5
Population Rank (State)
322 0.06%
Annual Population Growth

Montgomery County Population

Demographics

Economics and Income Statistics