Ralph Melville Warren (4 March 1882 – 6 May 1954) was a Canadian politician, a member of the House of Commons of Canada and the Legislative Assembly of Ontario. He was born in Wilberforce Township, Ontario where he attended secondary school and became a farmer by career. In the 1919 Ontario election, he was elected under the United Farmers of Ontario party which formed the government. He held the Renfrew North provincial seat for one term until defeated in the 1923 election. From 1930 to 1938 he was reeve of Wilberforce Township.