Otto Singer (July 26, 1833 – January 3, 1894) was a German musician also active in the USA.Singer was born in Sora, Saxony. He was educated in Dresden, and later in Leipzig until 1865, and after a short residence in Weimar with Franz Liszt went to New York in 1869.In 1873 he went to Cincinnati as assistant musical director, under Theodore Thomas, of the first May Musical Festival, in that year.