Spring Hill, Florida is located in Hernando County. It is a census-designated place (CDP) with a population of 113,568 as of the 2020 census. Spring Hill is part of Florida's Nature Coast region and lies within the Tampa-St. Petersburg-Clearwater metropolitan area

. Note that while most of Spring Hill is in Hernando County, the ZIP code 34610 associated with Spring Hill is partially in neighboring Pasco County, but the Spring Hill CDP itself does not extend into Pasco County