Bradley Junction (also known as Bradley) is an unincorporated community and census-designated place in southwestern Polk County, Florida, United States. Its population was 542 as of the 2020 census.
Bradley Junction is named for the railroad junction located in the community, which was historically the junction between the Seaboard Air Line Railroad (the east-west track) and the Charlotte Harbor and Northern Railway (the north-south track). The junction itself is named after phosphate mining company executive Peter B. Bradley, who chartered the Charlotte Harbor and Northern Railway in 1905. The railroad junction still exists today and both lines are now owned by CSX Transportation. In the mid 1990s, the Florida Gulf Coast Railroad Museum (now the Florida Railroad Museum) moved the railroad station from Bradley Junction to Parrish. The depot was then consumed by a fire soon after the move.
Bradley Junction's elevation is 135 feet above sea level.
The community of Bradley Junction is served by Polk County Public Schools.