J52 may refer to:
- Augmented pentagonal prism
- HMS Dunoon (J52), a Hunt-class minesweeper of the Royal Navy
- HMS Guysborough (J52), a Bangor-class minesweeper of the Royal Navy and Royal Canadian Navy
- LNER Class J52, a British steam locomotive class
- Malaysia Federal Route J52
- Pratt & Whitney J52, a turbojet engine