Heritage Lake is an unincorporated community and census-designated place in Floyd Township, Putnam County, in the U.S. state of Indiana. As of the 2020 census, Heritage Lake had a population of 3,012. The community is located in eastern Putnam County on the shores of its namesake lake. The lake is 318 acres in size.
According to the U.S. Census Bureau, the community has an area of , of which is land and is water.