| Mattias Thunman Hälldahl | |
| Team: | Timrå IK |
| Position: | Defence |
| Height Ft: | 5 |
| Height In: | 10 |
| Weight Lb: | 172 |
| Shoots: | Left |
| Birth Date: | 7 September 1993 |
| Birth Place: | Sweden |
| Career Start: | 2013 |
Mattias Thunman Hälldahl (born September 7, 1993) is a Swedish ice hockey defenceman. He is currently playing with Timrå IK of the Swedish Hockey League (SHL).
Thunman-Halldahl made his Elitserien (now the SHL) debut playing with Timrå IK during the 2012–13 Elitserien season.[1]