| Ralph Kubail | |
| Birth Date: | 30 April 1952 |
| Birth Place: | Berlin |
| Sport: | Rowing |
| Club: | Potsdamer RC Germania |
Ralph Kubail (30 April 1952 – 15 August 1981) was a German rower who competed for West Germany in the 1976 Summer Olympics.
At the 1974 World Rowing Championships in Lucerne, he won bronze with the coxed four.[1] At the 1975 World Rowing Championships in Nottingham, he won bronze with the coxed four. In 1976 he was a crew member of the West German boat that won the bronze medal in the coxed four event.[2] He died of a lymphoma on 15 August 1981.