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