Ian Arthur (born 1984) is a Canadian politician, first elected to the Legislative Assembly of Ontario in the 2018 provincial election. He represents the riding of Kingston and the Islands as a member of the Ontario New Democratic Party. He was officially sworn in as the Member of Provincial Parliament on July 10, 2018. As a member of the Official Opposition, Arthur currently serves on the Finance and Economic Affairs committee of the Legislative Assembly. He served as the Official Opposition Critic for the Environment until February 1, 2021 when he was appointed the Critic for Small Business Recovery and Reopening Main Street.