Sarasota County is a county located in the U.S. state of Florida. As of the 2010 census, the population was 379,448. Its county seat is Sarasota, and its largest city is North Port. A majority (over 60%) of Sarasota County's residents live in unincorporated areas outside of its four municipalities. Sarasota County is included in the North Port-Sarasota-Bradenton, FL Metropolitan Statistical Area.