U-boat (German: U-Boot) is a German military submarine of World War I and II.
U-boat or U-Boot may also refer to:
Games Board games U-Boat (game), a board game published by Avalon Hill in 1959 U-Boat (wargame), a board game published in 1977 by Tabletop Games
Video games U-boat (video game), a 1994 submarine simulation video game Uboat (video game), a 2024 submarine simulation video game
Software Das U-Boot, computer software, a GNU GPL boot loader
Transport U-boat, a nickname for the GE Universal Series of diesel locomotives built by General Electric Southern Railway's U and U1 class locomotives, nicknamed "U-boats" U-boat, an Australian class of interurban railcars, otherwise known as U sets U-boat, a nickname for the WAGR U Class steam locomotives built by the North British Locomotive Company in 1942
Other Woody Woodmansey's U-Boat, an English rock band, formed in 1976. U-boot (cocktail), a cocktail made with vodka and beer "U Boat", a song on the album Kasabian by the band of the same name
See also
it:U-boat