Otto Lohmüller (born 4 February 1943 in Gengenbach, Baden-Württemberg, Germany) is a German figurative painter, sculptor and book illustrator.
His art typically features images of early adolescent males, both clothed and nude, although in his published work there is little overt eroticism.
He works almost exclusively with the human form, usually with minimal backgrounds, in an idealized near-photographic realist style.
In addition to boys, his portraits and sculpture include people of all ages from his town, people from his travels to India and Southeast Asia, and occasionally public figures.
Some of his works contain subtle political or societal commentary, although this is not a major theme.
Occasionally he indulges in wryly humorous works of fantasy, but is primarily a representational artist.
His published works are listed in the Catalog of the German National Library.