Taylor-Sinclair signed for First Division side Partick Thistle on 5 July 2011, where he signed a two-year contract for an undisclosed fee.
He made his competitive debut during a 2–1 victory against Stenhousemuir in the Scottish Challenge Cup on 23 July 2011.
His impressive form at the start of the season, led to some attraction from English Championship clubs, such as Cardiff City and Southampton.
and he was given the SFL Young Player of the Month award for October 2011.

Taylor-Sinclair played an instrumental part in season 2012–13 as Partick Thistle won the First Division Championship.
His impressive form at Thistle sparked interest from Glasgow rivals Celtic and from English clubs including Cardiff City and Middlesbrough.
Taylor-Sinclair signed for First Division side Partick Thistle on 5 July 2011, where he signed a two-year contract for an undisclosed fee. He made his competitive debut during a 2–1 victory against Stenhousemuir in the Scottish Challenge Cup on 23 July 2011. His impressive form at the start of the season, led to some attraction from English Championship clubs, such as Cardiff City and Southampton. and he was given the SFL Young Player of the Month award for October 2011.
Taylor-Sinclair played an instrumental part in season 2012–13 as Partick Thistle won the First Division Championship. His impressive form at Thistle sparked interest from Glasgow rivals Celtic and from English clubs including Cardiff City and Middlesbrough.
Aaron Taylor-Sinclair