P84

P84 may refer to:


 * HMAS Aitape (P 84), a patrol boat of the Royal Australian Navy
 * Hunting-Percival P.84 Jet Provost, a British trainer aircraft
 * p87PIKAP, phosphoinositide-3-kinase adapter protein of 87 kDa
 * Papyrus 84, a biblical manuscript
 * Polyimide P84
 * Republic XP-84 Thunderjet, an American turbojet fighter-bomber
 * P84, a state regional road in Latvia