Rainer Borkowsky (born 19 October 1942) is a German rowing coxswain who competed for the United Team of Germany in the 1956 Summer Olympics.

[1] At the 1956 European Rowing Championships in Bled, Yugoslavia, he won a gold medal in the coxed pair with rowers Karl-Heinrich von Groddeck and Horst Arndt.

[2] The same team went to the 1956 Summer Olympics in Melbourne, Australia, where they won the silver medal in this boat class.

[1] At the 1957 European Rowing Championships in Duisburg, Germany, they again won a gold medal.

This article about a rowing Olympic medalist for Germany is a stub.