Otto Friedrich was an Austrian Art Nouveau painter of.

Friedrich studied at the Vienna Academy of Fine Arts with August Eisenmenger and Carl Müller and at the Munich Academy with Wilhelm von Lindenschmidt. From 1891 to 1894 he went on extensive study trips before he settled permanently in Vienna in 1896. Here he was one of the founding members of the Vienna Secession in 1897. He was also the editor of their magazine Ver Sacrum. Otto Friedrich was a teacher at the Vienna Women's Academy.