The Clearwater Subdivision is a railroad line owned by CSX Transportation in the Tampa Bay region of Florida. The line begins just east of downtown Tampa in Gary and heads north through some of Tampa's suburban neighborhoods. In Sulphur Springs, the Clearwater Subdivision turns and runs west through Oldsmar, where it crosses Tampa Bay. It briefly shifts south running through Safety Harbor, and then heads west again to Clearwater. In Clearwater, it turns southeast, running through Largo and Pinellas Park before terminating at Fifth Avenue North in St. Petersburg near Tropicana Field. The distance from Gary to St. Petersburg along the line is 48.6 miles (78.2 km). At the line's north end it continues from the Tampa Terminal Subdivision and at its south end the track comes to an end.

Pinellas Park is a city located in central Pinellas County, United States. The population was 53,093 at the 2020 census. The city is the fourth largest city in Pinellas County. The City of Pinellas Park was incorporated in 1914. It is part of the Tampa–St. Petersburg–Clearwater Metropolitan Statistical Area, most commonly referred to as the Tampa Bay Area.