Thonotosassa is a census-designated place in Hillsborough County, Florida, United States. The population was 15,238 at the 2020 census, up from 13,014 at the 2010 census.
Seffner is a census-designated place in Hillsborough County, Florida, United States. The population at the 2020 census was 8,362, up from 7,579 at the 2010 census.
Thonotosassa, Florida
…Thonotosassa is located in northeastern Hillsborough County. It is bordered to the southwest by East Lake-Orient Park, and to the south by Mango and Seffner. The unincorporated community of Antioch is on the eastern edge of the CDP. The Hillsborough River forms the northern edge of the CDP, Interstate 4…