2017 FC Seoul season

The 2017 season was FC Seoul's 34th season in the K League Classic.

Pre-season

 * In Guam: From 3 January 2017 to 21 January 2017

Match reports and match highlights
Fixtures and Results at FC Seoul Official Website 

Attendance records

 * Season total attendance is K League Classic, FA Cup, and AFC Champions League combined

Team squad
All players registered for the 2017 season are listed.

Out on loan and military service
※ In: Transferred from other teams in the middle of the season.

※ Out: Transferred to other teams in the middle of the season.

※ Discharged: Transferred from Sanjgu Sangmu or Ansan Mugunghwa for military service in the middle of the season (registered in 2016 season).

※ Conscripted: Transferred to Sangju Sangmu or Ansan Mugunghwa for military service after the end of the season.