Guardian (disambiguation)
Guardian might refer to:

 Guardian, someone who guards, watches over, or protects something

 Guardian (Klingon), the Klingons who were members of the Followers of Kahless
 Guardian (law), someone who oversaw an incompetent person or minor's care
 Guardian (Trill), the Trill who watch over young symbionts on Trill
 Guardian (Xindi), the Xindi given given to the Sphere-Builders

See also
 Guardian angel
 Guardian of Forever, a gateway to other times