P63

P63 may refer to:

Vessels

 * 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

Other uses

 * 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