Galaxy X may refer to:
Galaxy Nexus, a smartphone released in 2011, marketed in Brazil as the "Galaxy X" Galaxy X (galaxy), a postulated satellite galaxy of the Milky Way Galaxy "Galaxy X" (trilogy), a 2009 trilogy of The Hardy Boys novels, see List of Hardy Boys books Galaxy X (novel), a 2009 novel in the eponymous trilogy of "The Hardy Boys" novels, see List of Hardy Boys books
See also X-shaped radio galaxy X-ray galaxy Galaxy Note 10.1 Galaxy Tab 10.1 Galaxy S10 Galaxy Note10 Galaxy 10, a satellite lost on launch in 1998; see Delta III#Launches Galaxy 10R