Lucien Turcotte Pacaud (September 21, 1879 – March 5, 1960) was a Canadian lawyer and political figure. He represented Mégantic in the House of Commons of Canada from 1911 to 1922 as a Liberal member. He was born in Trois-Rivières, Quebec, in 1879, the son of Ernest Pacaud and the grandson of Joseph-Édouard Turcotte. He was educated at Bishop's College and Laval University. Pacaud was admitted to the bar in 1904 and practised at Quebec City and then at Thetford Mines. In 1908, he married Helen Elizabeth Buckmall. Pacaud served as police commissioner for the Transcontinental Railway from 1907 to 1911. He was Parliamentary Under Secretary of State for External Affairs, a non-cabinet post, from 1921 to 1922. He served as Secretary to the Canadian High Commissioner at London from 1922 to 1931. In 1930, Pacaud served as acting Canadian High Commissioner to the United Kingdom after the death of Peter Charles Larkin.