P89

P89 may refer to:
 * DLR P89 stock, a passenger train on the Docklands Light Railway in London, UK
 * HMAS Assail (P 89), a patrol boat of the Royal Australian Navy
 * Northrop XP-89, an American prototype fighter aircraft
 * Papyrus 89, a biblical manuscript
 * Ruger P89, a pistol
 * P89, a state regional road in Latvia