U47 may refer to:
Naval vessels , various vessels , a sloop of the Royal Navy , a submarine of the Austro-Hungarian Navy
Other uses Great ditrigonal icosidodecahedron Neumann U 47, a microphone Small nucleolar RNA SNORD47 U 47 – Kapitänleutnant Prien, a German war film Uppland Runic Inscription 47 U47, a line of the Dortmund Stadtbahn