| Ottmar Ostermayr | |
| Birth Date: | 24 October 1886 |
| Birth Place: | Munich, Bavaria German Empire |
| Death Place: | Munich, Bavaria West Germany |
| Occupation: | Producer Director |
| Yearsactive: | 1910–1958 |
Ottmar Ostermayr (24 October 1886 – 15 December 1958) was a German film producer. He was the brother of Franz Osten and Peter Ostermayr. From 1911 until 1914 he worked for Vienna subsidiary of the French company Eclair. In the 1920s he set up a production company with the film pioneer Oskar Messter.[1] He was later employed at the Munich-based Bavaria Film which had been set up by his brother Peter.