| Honorific-Prefix: | The Hon. |
| Eileen Rossiter | |
| Office: | Senator for Prince Edward Island |
| Appointed: | Brian Mulroney |
| Term Start: | 1986 |
| Term End: | 2004 |
| Birth Date: | 14 July 1929 |
| Birth Place: | Souris, Prince Edward Island |
| Committees: | Chair, Standing Committee on Fisheries (1991-1996) |
| Party: | Progressive Conservative (1986-2004) Conservative (2004) |
| Relations: | James Joseph Hughes, grandfather |
Eileen Rossiter, (née Hughes) (July 14, 1929 - January 20, 2007) was a Canadian politician. She was the second Prince Edward Island woman appointed to Senate of Canada (the first was Florence Elsie Inman).
Born in Souris, Prince Edward Island, she was a realtor before being appointed to the Senate in 1986 representing the senatorial division of Prince Edward Island. She sat as a Progressive Conservative and later a Conservative. She retired on her 75th birthday in 2004.
She married Linus J. Rossiter in 1952. They had six children: Philip, Leonard, Kevin, Patricia, Colleen, and Mary.