| Simon Dia | |
| Fullname: | Ousmane Simon Pierre Alexandre Dia |
| Birth Date: | 17 July 1992 |
| Birth Place: | Saint-Quentin, France |
| Height: | 1.93 m[1] |
| Position: | Forward |
| Currentclub: | Bangkok |
| Clubnumber: | 92 |
| Youthclubs1: | Lille |
| Youthclubs2: | Valenciennes |
| Years1: | 2010–2014 |
| Clubs1: | Valenciennes |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 2011–2014 |
| Clubs2: | Valenciennes B |
| Caps2: | 45 |
| Goals2: | 15 |
| Years3: | 2012–2013 |
| Clubs3: | → Lekhwiya (loan) |
| Caps3: | 4 |
| Goals3: | 0 |
| Years4: | 2014–2015 |
| Clubs4: | Amiens |
| Caps4: | 18 |
| Goals4: | 1 |
| Years5: | 2015–2017 |
| Clubs5: | Saint-Quentin |
| Caps5: | 51 |
| Goals5: | 21 |
| Years6: | 2017–2019 |
| Clubs6: | Entente SSG |
| Caps6: | 61 |
| Goals6: | 10 |
| Years7: | 2019 |
| Clubs7: | Police Tero |
| Caps7: | 15 |
| Goals7: | 9 |
| Years8: | 2020 |
| Clubs8: | Chainat Hornbill |
| Caps8: | 6 |
| Goals8: | 1 |
| Years9: | 2021 |
| Clubs9: | Ratchaburi |
| Caps9: | 5 |
| Goals9: | 1 |
| Years10: | 2021 |
| Clubs10: | Sitra |
| Caps10: | 0 |
| Goals10: | 0 |
| Years11: | 2022 |
| Clubs11: | Kasetsart |
| Caps11: | 16 |
| Goals11: | 7 |
| Years12: | 2023 |
| Clubs12: | Ayutthaya United |
| Caps12: | 13 |
| Goals12: | 3 |
| Years13: | 2023–2024 |
| Clubs13: | Olympic Charleroi |
| Caps13: | 10 |
| Goals13: | 1 |
| Years14: | 2024– |
| Clubs14: | Bangkok |
| Caps14: | 0 |
| Goals14: | 0 |
| Club-Update: | 9 August 2023 |
Ousmane Simon Pierre Alexandre Dia (born 17 July 1992) is a French professional footballer who plays as a forward for Thai League 2 club Bangkok.
Simon Dia was born in Saint-Quentin, France. He began his career at Valenciennes. In October 2012, Dia signed on loan for Qatari club Lekhwiya.[2] During his time at the club, Dia made four first team appearances for the club in the Qatar Stars League.
In January 2014, Dia signed for Amiens, making his debut against Dunkerque.[3]
On 14 August 2015, Dia signed for his hometown club of Saint-Quentin, after rejecting an offer from Belgian club Seraing.[4]
On 1 July 2023, Dia signed for Olympic Charleroi, returning to European football for the first time since 2019.[5]