Robert John Gray (8 March 1898 – 2 August 1978) was an Australian politician.
He was born in Brunswick to farmer Matthew Gray and Susan Jane Saggers.
In 1943 he was elected to the Victorian Legislative Assembly in a by-election for the seat of Nunawading, representing the Labor Party.
He returned to the Assembly in 1952 and was briefly a minister without portfolio in 1955, in which year he was defeated for a second time.
Gray had been widowed and married Mary Byrne in 1952.