| Seanna Mitchell | |
| Fullname: | Seanna Mitchell |
| Club: | Cascade Swim Club |
| Collegeteam: | University of Calgary |
| Birth Date: | 2 July 1988 |
| Birth Place: | Montreal, Quebec |
| Weight: | 72kg (159lb) |
Seanna Mitchell (born July 2, 1988 in Montreal, Quebec) is a female swimmer from Canada, who mostly competes in the freestyle events. She claimed a silver medal (4 × 100 m freestyle) at the 2007 Pan American Games in Rio de Janeiro, Brazil.