Captiva is an unincorporated community and census-designated place (CDP) in Lee County, Florida, United States. It is located on Captiva Island. As of the 2020 census, the population was 318, down from 583 at the 2010 census. It is part of the Cape Coral-Fort Myers, Florida Metropolitan Statistical Area.

Lee County is located in southwestern Florida, United States, on the Gulf Coast. As of the 2020 census, its population was 760,822. In 2022, the population was 822,453, making it the eighth-most populous county in the state. The county seat is Fort Myers, with a population of 86,395 as of the 2020 census, and the largest city is Cape Coral, with an estimated 2020 population of 194,016.