Roderick Mackenzie Gray was a British businessman and member of the Legislative Council of Hong Kong.
He was the head of the Reiss & Co. and the Chairman of the Hongkong and Shanghai Bank. He was made Justice of the Peace in 1890. From 1897 to 1900, he was Chairman of the Hong Kong General Chamber of Commerce from 1897 to 1900. On June 21, 1900, he was appointed unofficial member of the Legislative Council of Hong Kong vice E. R. Belilios resigned.
He married Eleanor Maud H. Potts in Hong Kong on 8 May 1893. He was a steward of the Hong Kong Jockey Club.