Zolfo Springs is a town in Hardee County, Florida, United States. The population was 1,641 at the 2000 census. According to the U.S. Census Bureau's 2004 estimates, the town had a population of 1,659. Zolfo Springs apartments for rent comparison page shows most up to date rent information on Zolfo Springs apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.