Sumava Resorts is an unincorporated community in Lake Township, Newton County, in the U.S. state of Indiana.Sumava Resorts was laid out in 1926. A post office has been in operation at the community since 1928.Sumava Resorts is located at 41°09′59″N 87°26′21″W / 41.16639°N 87.43917°W / 41.16639; -87.