K. Boom F.C. (Koninklijke Boom Football Club) was a Belgian football club founded as Rupel FC Boom in 1908 in Boom, near Antwerp. It changed its name in 1913 to Boom Football Club. It received the matricule nð58.
It last played in the Belgian First Division in the 1992/1993 season.
Due to financial, sporting and home ground difficulties, the club merged with neighbours S.K. Rupel in 1998 to form K Rupel Boom FC (matricule nð2138) and the matricule nð58 was subsequently erased.