Putnam is a town in Dewey County, Oklahoma, United States. The population was 30 as of the 2020 United States census. The community lies along U.S. Route 183. Putnam is located in southern Dewey County. Via US 183 it is 13 miles north to Taloga, the county seat, and 22 miles to Seiling. To the south on 183, it is 23 miles to Clinton.