Dufferin "Duff" Roblin (June 17, 1917 – May 30, 2010) was a Canadian businessman and politician. He served as the 14th premier of Manitoba from 1958 to 1967. Roblin was appointed to the Senate of Canada on the advice of Prime Minister Pierre Trudeau. In the government of Brian Mulroney, he served as government leader in the Senate. He was the grandson of Sir Rodmond Roblin, who also served as Manitoba Premier. His ancestor John Roblin served in the Upper Canada assembly. In 1970, he was made a Companion of the Order of Canada.
In the 1974 federal election, Roblin ran for the House of Commons in the Ontario riding of Peterborough. He was soundly defeated by Liberal Hugh Faulkner and later referred to the entire campaign as a lapse in judgement.
In 1978, Roblin was appointed to the Senate by Prime Minister Pierre Trudeau, officially representing the Manitoba region of Red River. He was the Deputy Leader of the Government in the Senate during Joe Clark's brief tenure as Prime Minister (1979–1980) and served as Deputy Opposition Leader from 1980 to 1984.
After Brian Mulroney's landslide victory in the 1984 election, Roblin was appointed Leader of the Government in the Senate, and served in Mulroney's cabinet until June 29, 1986. In that capacity, he was particularly interested in matters relating to African economic development.
Roblin retired from the Senate on June 17, 1992, having reached the mandatory retirement age of 75. He received the President's Award of the Winnipeg Press Club in 1999, and published his memoirs (entitled Speaking for Myself) in the same year.
Roblin, a veteran of World War II who fought in the Normandy Campaign, represented Manitoba at the 60th Anniversary of D-Day in France. He, along with Prince Charles and the Prime Ministers of Canada and France, commemorated the Canadian Servicemen who were lost that day in 1944.
At the time of his death, he was the oldest living former provincial premier. Roblin died at the age of 92 on the afternoon of May 30, 2010 at the Victoria General Hospital. Upon his death, former provincial NDP leader Ed Schreyer said that "Duff Roblin led a Conservative administration the likes we’ve not seen elsewhere in Canada and not likely to see again. It was positive in every respect. He brought Manitoba into the modern era, with desired changes in education, hospital finance, roads, social assistance and flood protection."