Putnam is an unincorporated community and census-designated place in Marengo County, Alabama, United States. As of the 2010 census, its population was 193.DemographicsAs of the 2010 United States Census, there were 193 people residing in the CDP. The racial makeup of the CDP was 72.5% Black, 23.3% White, 2.6% Native American and 1.6% from two or more races.GeographyPutnam is located at and has an elevation of 226ft.