| Becky Wiber | |
| Fullname: | Rebecca Gwendolyn Smith |
| Nicknames: | "Becky" |
| National Team: | Canada |
| Strokes: | Freestyle, butterfly, medley |
| Birth Date: | June 3, 1959 |
| Birth Place: | Edmonton, Alberta, Canada |
| Height: | 1.61m (05.28feet) |
| Weight: | 56kg (123lb) |
Rebecca Gwendolyn Smith (born June 3, 1959), professionally known as Becky Smith and later known by her married name Becky Wiber, is a Canadian former medley and butterfly swimmer who won the bronze medal in the women's 400-metre individual medley at the 1976 Summer Olympics in Montreal, Quebec, Canada, finishing behind East German Ulrike Tauber (gold) and her Canadian teammate Cheryl Gibson (silver). At the same Olympic Games, she also finished third in the women's 4×100-metre freestyle relay, alongside Gail Amundrud, Barbara Clark and Anne Jardin. Her brothers Graham and George also competed in swimming.
She was a grade school teacher at Westbrook School in Edmonton, Alberta for Grade 6. She retired in 2019.