Sidney MacEwen (born 18 November 1979) is a Canadian politician, who was elected to the Legislative Assembly of Prince Edward Island in the 2015 provincial election. He represents the electoral district of Morell-Donagh as a member of the Progressive Conservative Party. MacEwen holds a degree in industrial engineering from Dalhousie University. Prior to his election to the legislature, he worked as a lobster and tuna fisherman, as a business consultant for MRSB Consulting and as chief of staff to former Progressive Conservative leader Olive Crane.