The 2017–18 1. FC Köln season is the 70th season in the football club's history and 4th consecutive and 47th overall season in the top flight of German football, the Bundesliga, having been promoted from the 2. Bundesliga in 2014. In addition to the domestic league, 1. FC Köln also are participating in this season's editions of the domestic cup, the DFB-Pokal, and the second-tier continental cup, the UEFA Europa League. This is the 70th season for Köln in the RheinEnergieStadion, located in Cologne, North Rhine-Westphalia, Germany. The season covers a period from 1 July 2017 to 30 June 2018.