James Guy (13 November 1860 – 23 August 1921) was an Australian politician. A blacksmith by profession, he was one of the founders of the Australian Labor Party (Tasmanian Branch) in 1903 and held senior office in the party for nearly two decades. He was a member of the Tasmanian House of Assembly from 1909 to 1913 and a Senator for Tasmania from 1914 to 1920. His son Allan Guy followed him into politics.