Robert S. Bainbridge (January 21, 1913 – April 1959) was an American politician from New York.
He was born on January 21, 1913, in Staten Island, New York City, the son of John Keeble Bainbridge (1883–1948) and Adah (Wing) Bainbridge (1885–1927).
In 1935, he married Maxine Louis Ginder, of Dayton, Ohio, and they had two children.
In November 1947, he ran again for the State Senate but was defeated by Democrat John M. Braisted, Jr.
This article about a member of the New York State Senate is a stub.