P49

P49 may refer to:


 * HMS Unruly (P49), a submarine of the Royal Navy
 * INS Khukri (P49), a corvette of the Indian Navy
 * Lockheed XP-49, an American experimental fighter aircraft
 * Papyrus 49, a biblical manuscript
 * Percival P.49 Merganser II, a proposed British aircraft
 * P49, a Latvian state regional road