| Sidney MacEwen | |
| Honorific-Suffix: | MLA |
| Birth Date: | 18 November 1979 |
| Residence: | St. Peters Harbour, Prince Edward Island |
| Office1: | Member of the Legislative Assembly of Prince Edward Island for Morell-Mermaid |
| Term Start1: | May 4, 2015 |
| Term End1: | March 26, 2019 |
| Predecessor1: | Olive Crane |
| Successor1: | Riding dissolved |
| Office2: | Member of the Legislative Assembly of Prince Edward Island for Morell-Donagh |
| Term Start2: | April 23, 2019 |
| Predecessor2: | Riding established |
Sidney MacEwen (born 18 November 1979)[1] is a Canadian politician, who was elected to the Legislative Assembly of Prince Edward Island in the 2015 provincial election.[2] He represents the electoral district of Morell-Donagh as a member of the Progressive Conservative Party. He was re-elected in the 2023 general election.[3]
MacEwen holds a degree in industrial engineering from Dalhousie University.[4] 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.[4]