Robert Lowder Seaborn (9 July 1911 – 15 February 1993) was a Canadian minister of the Anglican faith. He was the Anglican Bishop of Newfoundland in Canada from 1965 to 1980.
Born in Toronto, Ontario he attended Normal Model School and completed high school at the University of Toronto Schools. He earned a BA in Classics in 1932 and a degree in Divinity at University of Trinity College at the University of Toronto and spent 1936-37 at Oxford University. He was ordained Deacon in 1934, Priest in 1935 and served as Assistant Curate in his initial parish, St. Simon-the-Apostle Church in Toronto, followed by St. James' Cathedral Toronto from 1937-41. He then became Rector of St. Peter's in Cobourg, Ontario (1941–48).
During World War II Seaborn spent a winter training in Debert, Nova Scotia and then was posted overseas in the spring of 1943. He served as Padre for the 1st Battalion, Canadian Scottish Regiment from 1943-1945 and participated in the D-Day Normandy Landings. As part of that landing he held individual services on all three ships over which the Canadian Scottish Regiment was scattered. He won a Military Cross during the Juno Beach fighting for carrying wounded to safety while under fire. He was awarded the "Croix de Guerre" by the French Government. On July 15, 1944, he appeared in a photograph saying a prayer over a soldier of the 3rd Canadian Infantry Division. This photo has appeared many times since in publications related to World War II and served as the basis for a stained glass window located in Ottawa, Ontario.