U6

U6 or U-6 may refer to:


 * German submarine U-6, one of several German submarines
 * U6, a railway line on several underground railway systems:
 * U6 U-Bahn line, a line on the Berlin U-Bahn
 * U6, a line on the Frankfurt U-Bahn
 * U6, a line on the Munich U-Bahn
 * U6, of the Vienna U-Bahn system.
 * The IATA airline designator code for Ural Airlines


 * British NVC community U6, Juncus squarrosus – Festuca ovina grassland, one of the calcifugous grassland communities of the British National Vegetation Classification
 * Ultima VI, a computer role-playing game
 * U6, a U.S. unemployment statistic - see Unemployment
 * U6 promoter, a gene playing an important role in the synthesis of shRNA
 * Haplogroup U6
 * U6 spliceosomal RNA, a small nuclear RNA component of the spliceosome
 * US military designation for the DHC-2 Beaver aircraft
 * Miss Madison, an Unlimited Hydroplane boat that carries the American Power Boat Association entrant number U-6.
 * Upper sixth (grade 13) in British secondary education