Konstantin Stoitzner was an Austrian painter.
The son of the botanist and teacher Karl Stoitzner, he studied at the Vienna Academy of Fine Arts under August Eisenmenger and Christian Griepenkerl. He created oil paintings with genre scenes, portraits and still life.From 1900 he mainly devoted himself to landscape painting with motifs from the Alps, Burgenland, Moravia, East Frisia and the Lüneburg Heath. From 1914 to 1923 he headed the Austrian Association of Artists.