German submarine U-30

U 30 may refer to:

• SM U 30, a submarine of the Imperial German Navy in World War I
• SM U -30 ( kuk Marine ), a submarine of the Austria -Hungarian Navy in WWI
• U 30 ( Navy ), a U- boat of the German Kriegsmarine during World War II
• U 30 (Bundeswehr), a submarine of the German Bundeswehr

• Disambiguation
• Abbreviation