Brooksville is a city and the county seat of Hernando County, Florida, in the United States. At the 2010 census it had a population of 7,719, u…Brooksville is a city and the county seat of Hernando County, Florida, in the United States. At the 2010 census it had a population of 7,719, up from 7,264 at the 2000 census. Brooksville is home to historic buildings and residences, including the homes of former Florida governor William Sherman Jennings and football player Jerome Brown.