Heinrich Otto (6 July 1858, Homberg - 13 May 1923, Düsseldorf) was a German painter, lithographer, woodcut artist, and etcher.
He was the second child born to Johannes Otto (1828–1889), a farmer and fruit seller, and his wife, Anna Gertrude née Scheibeler.
In 1901, he was awarded Dresden's "Goldene Staatsmedaille" for his lithograph, Mondnacht (moon night), which gained him a wider audience among private collectors.
During World War I, he lived in Wernswig [de], where he managed a farm belonging to one of his nephews, who had been drafted.
He returned to Düsseldorf, where he had been appointed a Professor at the Kunstakademie, and died there in 1923, shortly before he would have turned sixty-five, from pneumonia.