Lithia is an unincorporated community in Hillsborough County, Florida, United States. It is a suburb of Tampa and has a population of 8,527. The zip code is 33547. The area code is 813. The area includes the Census-designated place (CDP) of Fish Hawk. Lithia is home to the 2,963 acre Alafia River Corridor and 5,515 acre Chito Branch Reserve.