P63

P63 may refer to:

• HMS Unswerving (P63), a submarine of the Royal Navy
• INS Kulish (P63), a corvette of the Indian Navy
• LÉ William Butler Yeats (P63), an offshore patrol vessel of the Irish Naval Service

• Bell P-63 Kingcobra, an American fighter aircraft
• BMW P63, an automobile engine
• Papyrus 63, a biblical manuscript
• TP63, tumor protein p63
• P63, a state regional road in Latvia