| Joanna Hoareau | |
| Nationality: | Seychellois |
| Sport: | Track and field |
| Event: | Sprints |
| Birth Date: | 19 January 1979 |
| Weight: | 540NaN0 |
Joanna Hoareau (born 19 January 1979) is a Seychellois former sprinter and long jumper.
Representing Seychelles at the 1999 All-Africa Games, Joanna competed in the women's 100 metres, 200 metres and long jump. Although she failed to win a medal in any of these events, she was selected to take part in the Sydney Olympics the following year, running in the women's 100 metres: Hoareau finished sixth in heat seven of the qualifications with a time of 12.01 seconds and did not progress to the semi-finals.
Hoareau is the current national record holder in the women's 200 metres and 4 × 400 metres relay.