Walter Breuer, also credited as Siegfried Breuer Jr. (July 16, 1930, Vienna – June 8, 2004), was an Austrian film actor.

Trained at the Max Reinhardt Seminar in Vienna, he began working in film in the early 1950s and was briefly engaged at the Deutsche Theater (German Theatre) in Göttingen. In contrast to his father Siegfried Breuer, who was known for portraying cold and calculating characters, Breuer was frequently cast as a young romantic lead, including an appearance opposite Romy Schneider in Die Deutschmeister (1955).

Unable to firmly establish himself in this type of role, his film career gradually declined, and his final screen appearance was in In Frankfurt sind die Nächte heiß (1966). He later worked as a production assistant at Bayerischer Rundfunk (Bavarian Broadcasting). Two of his sons, Jacques and Pascal Breuer, also became actors.