Lamine Diack (born 15 November 2000) is a Senegalese professional footballer who plays as a defensive midfielder for Swiss Super League club Sion on loan from club Nantes.
A product of the youth academy of the Oslo FA in Senegal, Diack transferred to the Macedonian club Shkupi on 7 June 2019, signing a two-year contract. After two seasons in the Macedonian First Football League, Diack moved to the TFF First League with Tuzlaspor on 11 August 2021. In the summer of 2022 his license was issued to Fenerbahçe, who promptly transferred him to Ankaragücü on 25 July 2022 on a 3+1 year contract. He made his Süper Lig with Ankaragücü in a 0âÂÂ0 tie with Konyaspor on 8 August 2022.
On 31 July 2023, Ligue 1 club Nantes announced the signing of Diack on a season-long loan with a future obligatory buy clause.
After Nantes made the transfer permanent, Diack moved on a six-months loan to Major League Soccer club Colorado Rapids. He left Colorado on 30 June 2024. On 23 July 2025, Diack moved on a new loan to Sion in Switzerland.
Diack represented the Senegal U20s at the 2019 Africa U-20 Cup of Nations.