Putnam County is the name of 9 counties in the United States of America, many of which are named for Israel Putnam, who was a hero in the French and Indian War and a general in the American Revolutionary War:

• Putnam County, Florida (It is not certain as to whether this one was named for Israel Putnam. There is also a possibility that it was named for Benjamin A. Putnam, an officer in the First Seminole War and local Florida politician.)
• Putnam County, Georgia
• Putnam County, Illinois
• Putnam County, Indiana
• Putnam County, Missouri
• Putnam County, New York
• Putnam County, Ohio
• Putnam County, Tennessee
• Putnam County, West Virginia