Putnam County is a county located in the U.S. state of New York. As of the 2010 census, the population was 99,710. The county seat is Carmel. Putnam County formed in 1812 from Dutchess County and is named for Israel Putnam, a hero in the French and Indian War and a general in the American Revolutionary War.
The population of Putnam County has decreased since 2010.