P41 or P-41 may refer to:
Vessels ARA Espora (P-41), a corvette of the Argentine Navy , a submarine transferred from the Royal Navy to the Royal Norwegian Navy , a patrol vessel of the Irish Naval Service
P-41 Cormorán, a retired patrol boat of the Spanish Navy
Other uses Papyrus 41, a biblical manuscript Phosphorus-41, an isotope of phosphorus Seversky XP-41, an American prototype fighter aircraft P41, a Latvian state regional road P41, a Mazda auto racing engine developed by Advanced Engine Research P41, three-dimensional space group number 76