| Team: | Vaasan Sport |
| League: | Mestis |
| Position: | Defence |
| Height Ft: | 6 |
| Height In: | 5 |
| Weight Lb: | 223 |
| Shoots: | Right |
| Birth Date: | 1989 8, df=yes |
| Birth Place: | Helsinki, Finland |
| Career Start: | 2009 |
Ari Gröndahl is a Finnish professional ice hockey defenceman who currently plays for Vaasan Sport of the Mestis.