Lithia is an unincorporated community in Hillsborough County, Florida, United States. It is a suburb of Tampa. The ZIP codes are 33547, 33596, and the area code is 813. It is part of the census-designated place (CDP) of Fish Hawk. Lithia is home to the 2,963-acre (1,199 ha) Alafia River Corridor and 5,515-acre (2,232 ha) Chito Branch Reserve.