Putnam County Flag

Putnam County

State:
Indiana
County Seat:
Greencastle

Putnam County's estimated 2026 population is 38,256 with a growth rate of 0.59% in the past year according to the most recent United States census data. Putnam County is the 40th largest county in Indiana. The 2010 population was 37,903 and has seen a growth of 0.93% since that time.

38,256
Total Population
80
Population Density (mi²)
40
Population Rank (State)
226 0.59%
Annual Population Growth

Putnam County Population

Demographics

Economics and Income Statistics