The North American P-51 Mustang is an American World War II fighter aircraft.
P51 or P-51 may also refer to:
Vessels , a patrol vessel of the Argentine Navy , a submarine of the Royal Navy , a patrol vessel of the Indian Navy , a patrol vessel of the Irish Naval Service
Other uses BenQ-Siemens P51, a PDA smartphone P-51 can opener, a larger version of the P-38 can opener issued by the United States Armed Forces Papyrus 51, a biblical manuscript Parker 51, a fountain pen P51, a state regional road in Latvia ThinkPad P51, a laptop in the ThinkPad P Series