Warm Mineral Springs is a census-designated place in Sarasota County, Florida, United States. The population was 5,442 at the 2020 census, up from 5,061 at the 2010 census. It is part of the North Port–Bradenton–Sarasota, Florida Metropolitan Statistical Area. The Warm Mineral Springs locale is notable for a free-flowing artesian spring. A large portion of the area was annexed by the municipality of North Port, and is now part of that city.