Gulfport is a city in Pinellas County, Florida, United States, bordering St. Petersburg, South Pasadena, and Boca Ciega Bay. The population o…Gulfport is a city in Pinellas County, Florida, United States, bordering St. Petersburg, South Pasadena, and Boca Ciega Bay. The population of Gulfport was 11,783 at the 2020 census. Gulfport is part of the Tampa–St. Petersburg–Clearwater metropolitan statistical area.