| Club: | Bayer Leverkusen |
| Season: | 2017–18 |
| Owner: | Bayer AG |
| Owntitle: | Sporting Director |
| Chairman: | Michael Schade |
| Chrtitle: | Managing director |
| Manager: | Heiko Herrlich |
| Stadium: | BayArena |
| League: | Bundesliga |
| League Result: | 5th |
| Cup1: | DFB-Pokal |
| Cup1 Result: | Semi-finals |
| Pattern La1: | _bayer1718h |
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| Pattern La3: | _bayer1617t |
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| Updated: | 21 May 2018 |
| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
The 2017–18 Bayer 04 Leverkusen season was the 114th season in the football club's history and 39th consecutive and overall season in the top flight of German football, the Bundesliga, having been promoted from the 2. Bundesliga Nord in 1979. In addition to the domestic league, Bayer Leverkusen also participated in this season's edition of the domestic cup, the DFB-Pokal. This was the 60th season for Leverkusen in the BayArena, located in Leverkusen, North Rhine-Westphalia, Germany. The season covers a period from 1 July 2017 to 30 June 2018.