St. Pete Beach is a coastal city in Pinellas County, Florida. Known as a tourist destination, St. Pete Beach was formed from the towns of Pas…St. Pete Beach is a coastal city in Pinellas County, Florida. Known as a tourist destination, St. Pete Beach was formed from the towns of Pass-a-Grille, Belle Vista, St. Petersburg Beach, and unincorporated Pinellas County. It is part of the Tampa Bay area. The population was 8,879 at the 2020 census.