| Birth Date: | 12 January 1890 |
| Birth Place: | Karlsruhe, German Empire |
| Death Place: | Karlsruhe, West Germany |
| Strokes: | Backstroke |
Otto Groß (12 January 1890 - 16 October 1964) was a German backstroke swimmer who competed in the 1912 Summer Olympics. He was born in Karlsruhe. In 1912, he finished fifth in the 100 metre backstroke competition.[1]