Major General Winston Joseph Dugan, 1st Baron Dugan of Victoria GCMG, CB, DSO, KStJ (3 September 1876 – 17 August 1951), known as Sir Winston Dugan between 1934 and 1949, was a British administrator and a career British Army officer. He served as Governor of South Australia from 1934 to 1939, then Governor of Victoria until 1949.
Dugan was the son of Charles Winston Dugan, of Oxmantown Mall, Birr, County Offaly, Ireland, an inspector of schools. His mother was born Esther Elizabeth Rogers. He attended Lurgan College, Craigavon, Ireland from 1887 to 1889, and Wimbledon College, Wimbledon, London, England. The family name was pronounced as "Duggan". They were originally from County Galway and were a branch of the Soghain people.
Dugan was a sergeant in the Royal Sussex Regiment, but transferred to the Lincolnshire Regiment as a second lieutenant on 24 January 1900. He fought with the 2nd battalion of his regiment in the Second Boer War 1899-1900, and received the Queen's South Africa Medal with three clasps. Following the war he was appointed adjutant of his battalion on 28 June 1901, and promoted to lieutenant on 1 November 1901. He later fought with distinction in the First World War, where he was wounded and mentioned in despatches six times. He was awarded the Distinguished Service Order (DSO) in 1915 and appointed a Companion of the Order of St Michael and St George (CMG) in 1918. In 1929 he was made a Companion of the Order of the Bath (CB) and the following year he was promoted to major general. From 1931 to 1934 he commanded the 56th (1st London) Division, Territorial Army.