Putnam County

Ottawa, OH - County Seat


Welcome to Putnam County Ohio!           

This page is dedicated to you, the people who live and do business in Putnam County. This site will offer access to all of the county agencies.


Putnam County was formed on April 1, 1820, and was named for General Israel Putnam. Putnam County consists of 480 square miles and is divided into 15 townships, with 15 villages. The population in 2010 (last census) was 34,499.

245 East Main Street

Ottawa, Ohio 45875

Phone: 419-523-8700 / 888-638-0042

Hours of Operation: 8:30 - 4:30

 Click the logo to sign up for the alerts!