Leopold Einstein (born Leopold Löb, 1833, died 8 September 1890 in Nuremberg) was a Jewish teacher, vendor, and writer. He was one of the early proponents of Esperanto.He was the first chairperson of the "Nürnberger Weltspracheverein", a Volapük organization founded on 18 February 1885, and remained chairperson until his resignation due to poor health on 22 February 1888.