| Siamak Dadashi | |
| Fullname: | Siamak Dadashi |
| Birth Date: | 13 July 1974 |
| Birth Place: | Tehran, Iran |
| Currentclub: | Iran (assistant) |
| Position: | Winger |
| Clubs1: | Peyman |
| Clubs2: | Esteghlal |
| Clubs3: | Shahid Mansouri |
| Clubs4: | Shensa |
| Nationalteam1: | Iran |
| Managerclubs1: | Iran U19 |
| Manageryears2: | 2022– |
| Managerclubs2: | Iran (assistant) |
| Pcupdate: | 5 August 2022 |
| Ntupdate: | 14 April 2013 |
Siamak Dadashi (Persian: سیامک داداشی; born 13 July 1974) is an Iranian professional futsal coach and former player. He is currently assistant coach of Iran.[1]