U11 may refer to:
Naval vessels
, various vessels , a sloop of the Royal Navy , a submarine of the Austro-Hungarian Navy
Other uses U11 (Berlin U-Bahn), a planned transit line U11 (Nuremberg U-Bahn), a discontinued transit line BMW X1 (U11), a German crossover HTC U11, a smartphone Nissan Bluebird (U11), a Japanese sedan Truncated cuboctahedron U11 spliceosomal RNA Udet U 11 Kondor, a German prototype airliner Uppland Runic Inscription 11