Sinan Osmanoğlu (born 9 January 1990) is a Turkish professional footballer who plays as a centre back for TFF First League club Gençlerbirliği.
He began his senior career on 28 June 2011 with Galatasaray, going on loan with Bayrampaşaspor in the TFF Third League.
He transferred permanently to Altınordu in the summer of 2012, and spent 5 seasons with them and helped them earn promotion twice from the TFF Third League to the TFF Second League.
[3] On his debut season with them, he helped them win the 2021–22 TFF First League.
On 8 June 2022 he extended his contract with Ankaragücü for one more year as they prepared to play in the 2022-23 Süper Lig.