Günter Rittner (born 11 March 1927, in Breslau, Silesia, Germany) is a German painter and illustrator.
He ranks among the best known German portrayers of the 20th Century.
Rittner's portraits of Ludwig Erhard as well as of Kurt Georg Kiesinger are the foundation of the Gallery of Chancellors, established in 1976 by former Chancellor Helmut Schmidt in the Bundeskanzleramt in Berlin.