P47 or P-47 may refer to:
- HMS P47, a submarine of the Royal Navy
- Hutchinson Air Force Station, a United States Air Force station closed in 1968
- INS Khanjar (P47), a corvette of the Indian Navy
- P-47: The Phantom Fighter, an arcade video game
- Papyrus 47, a biblical manuscript
- Phosphorus-47, an isotope of phosphorus
- Republic P-47 Thunderbolt, an American fighter aircraft
- W.A.R. P-47 Thunderbolt, a half-scale replica aircraft
- P47, a Latvian state regional road