P84 may refer to:
, 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