Putnam County Flag

Putnam County

State:
Ohio
County Seat:
Ottawa

Putnam County's estimated 2026 population is 34,600 with a growth rate of 0.64% in the past year according to the most recent United States census data. Putnam County is the 70th largest county in Ohio. The 2010 population was 34,476 and has seen a growth of 0.36% since that time.

34,600
Total Population
72
Population Density (mi²)
70
Population Rank (State)
220 0.64%
Annual Population Growth

Putnam County Population

Demographics

Economics and Income Statistics