Ottomar Sachse (15 April 1951 – 21 December 2023^[1]) was an East German boxer. He competed at the 1972 Summer Olympics and the 1976 Summer Olympics in the light-heavyweight category.^[2]

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At the 1976 Summer Olympics, after a walkover against Louis Ngatchou of Cameroon, he defeated Joan Montane of Andorra before losing to Leon Spinks of the United States in the quarterfinals.^[2]