Stuk or STUK may refer to:
Radiation and Nuclear Safety Authority, the Finnish nuclear regulatory agency StuK, abbreviation of , a German designation for artillery guns "Stuk", a 2008 song by The Partysquad featuring Dio, Sef, Sjaak and Reverse "Stuk", ("a knock") a 1989 song by the Soviet band Kino from the album Zvezda po imeni Solntse.
See also Stuck (disambiguation) STUC (disambiguation)