Lutz, FL. Sponsored Topics. Lutz /luːts/ is an unincorporated census-designated place in Hillsborough County, Florida, United States. The population was 19,344 at the 2010 census. Lutz is located at 28°8′22″N 82°27′43″W / 28.13944°N 82.46194°W / 28.13944; -82.46194 (28.139428, -82.462028).