| Oussama M'Hamsi | |
| Birth Date: | 30 November 1998 |
| Birth Place: | Rabat, Morocco |
| Height: | 184 cm |
| Position: | Defender |
| Youthyears1: | –2019 |
| Youthclubs1: | Alessandria |
| Years1: | 2017–2019 |
| Clubs1: | → Casale (loan) |
| Caps1: | 68 |
| Goals1: | 4 |
| Years2: | 2019–2020 |
| Clubs2: | Alessandria |
| Caps2: | 2 |
| Goals2: | 0 |
| Club-Update: | 16 March 2020 |
Oussama M'Hamsi (born 30 November 1998) is a Moroccan footballer who plays as a defender.
Following a two-year loan spell with Casale in Serie D, M'Hamsi signed his first professional contract with Alessandria.[1] He made his league debut for the club on 15 December 2019, coming on as a 71st minute substitute for Francisco Sartore in a 2-1 home victory over Pro Vercelli.[2]