Do Canadians believe in Superman?
Say what? We invented him.
Sorta

Superman is a fictional character, a comic book superhero who appears in comic books published by DC Comics. He is widely considered to be an American cultural icon. Created by American writer Jerry Siegel and
Canadian-born American artist Joe Shuster in 1932 while both were living in Cleveland, Ohio, and sold to Detective Comics, Inc. (later DC Comics) in 1938, the character first appeared in Action Comics #1 (June 1938) and subsequently appeared in various radio serials, television programs, films, newspaper strips, and video games.