P34 or P-34 may refer to:
Vessels , a frigate of the Argentine Navy , a submarine of the Royal Navy , ships of the Indian Navy
Other uses Chuwabu language Cyclin-dependent kinase 1 Papyrus 34, a biblical manuscript Phosphorus-34, an isotope of phosphorus Tyrrell P34, a Formula One race car Wedell-Williams XP-34, a cancelled American fighter aircraft P34, a state regional road in Latvia