<Tr> <Th> GNIS feature ID </Th> <Td> 290375 </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.stpete.org </Td> </Tr> <P> St. Petersburg is a city in Pinellas County, Florida, United States . As of the 2015 census estimate, the population was 257,083, making it the fifth-most populous city in Florida and the largest in the state that is not a county seat (the city of Clearwater is the seat of Pinellas County). </P> <P> St. Petersburg is the second - largest city in the Tampa Bay Area, after Tampa . Together with Clearwater, these cities comprise the Tampa--St. Petersburg--Clearwater Metropolitan Statistical Area, the second - largest in Florida with a population of around 2.8 million . St. Petersburg is located on a peninsula between Tampa Bay and the Gulf of Mexico, and is connected to mainland Florida to the north . </P>

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