U11

U11 may refer to:

Naval vessels

 * BRAZILIAN TRANSPORT Duque de Caxias
 * GERMAN SUBMARINE U-11, various vessels
 * HMS Lark (U11), a sloop of the Royal Navy
 * SM U-11, 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