| Antti Kasvio | |
| Fullname: | Antti Alexander Kasvio |
| Strokes: | Freestyle |
| Club: | Laaksolahden Viri |
| Birth Date: | 20 December 1973 |
| Birth Place: | Espoo, Finland |
Antti Alexander Kasvio (born 20 December 1973 in Espoo) is a former freestyle swimmer from Finland who won the bronze medal in the 200 m freestyle at the 1992 Summer Olympics in Barcelona, Spain. Together with Jani Sievinen he was Finland's leading swimmer in the 1990s.
At the 1993 European Swimming Championships (long course) in Sheffield, Kasvio won the 200 and the 400 m freestyle. A year later, at the 1994 World Aquatics Championships in Rome, Italy, he won the world title in the 200 m freestyle and captured the silver medal in the 400 m freestyle.