Putnam County, Ohio

Putnam County
County
Putnam County Courthouse
Flag Seal
Location within the U.S. state of Ohio
Ohio's location within the U.S.
Coordinates: 41°01′N 84°08′W / 41.02°N 84.13°W / 41.02; -84.13
Country	United States
State	Ohio
Founded	January 3, 1834
Named for	Israel Putnam
Seat	Ottawa
Largest village	Ottawa
Area
• Total	484 sq mi (1,250 km2)
• Land	483 sq mi (1,250 km2)
• Water	1.8 sq mi (5 km2)  0.4%
Population  (2020)
• Total	34,451
• Density	71/sq mi (27/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional district	5th
Website	www.putnamcountyohio.gov

Putnam County is a county located in the northwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 34,451.^[1] Its county seat is Ottawa.^[2] The county was created in 1820 and later organized in 1834.^[3] Its name is in honor of Israel Putnam, a colonial officer in the French and Indian War, who served as a general in the American Revolutionary War.^[4] The Blanchard River, which passes through the county, was a key transportation route for early European-American settlers.