P61

P61 or P-61 may refer to:

Vessels

 * HMBS Nassau (P-61), a patrol boat of the Royal Bahamas Defence Force
 * HMS Varangian (P61), a submarine of the Royal Navy
 * INS Kora (P61), a corvette of the Indian Navy
 * LÉ Samuel Beckett (P61), an offshore patrol vessel of the Irish Naval Service
 * MALTESE PATROL BOAT P61
 * Polemistis (P61), a HSY-55-class gunboat of the Hellenic Navy

Other uses

 * Northrop P-61 Black Widow, an American night fighter aircraft
 * BRM P61, a Formula One racing car
 * P61 road (Ukraine)
 * Papyrus 61, a biblical manuscript
 * P61, a state regional road in Latvia
 * Sea Tiger (P61), a fictional submarine in the film We Dive at Dawn