Hilltop Lakes is a census-designated place and unincorporated community in Leon County, Texas, United States. As of the 2010 census, the population was 1,101. Hilltop Lakes is in southwestern Leon County, 27 miles southwest of Centerville, the county seat. The community is built around several artificial lakes, including Mirror Lake, Swan Lake, Kickā¦Hilltop Lakes is a census-designated place and unincorporated community in Leon County, Texas, United States. As of the 2010 census, the population was 1,101. Hilltop Lakes is in southwestern Leon County, 27 miles southwest of Centerville, the county seat. The community is built around several artificial lakes, including Mirror Lake, Swan Lake, Kickapoo Lake, Cherokee Lake, and Lake Tonkawa. The lakes are built on Running Creek or a tributary, with Running Creek flowing south to the Navasota River.