Spring Lake is an unincorporated community and census-designated place in Hernando County, Florida, United States. The population was 458 at the 2010 census, up from 327 at the 2000 census. Spring Lake is located in eastern Hernando County at 28°29′19″N 82°18′30″W / 28.48861°N 82.30833°W. It is bordered to the north by Hill 'n Dale. It is 8 miles so…Spring Lake is an unincorporated community and census-designated place in Hernando County, Florida, United States. The population was 458 at the 2010 census, up from 327 at the 2000 census. Spring Lake is located in eastern Hernando County at 28°29′19″N 82°18′30″W / 28.48861°N 82.30833°W. It is bordered to the north by Hill 'n Dale. It is 8 miles southeast of Brooksville, the county seat.