| Club: | RB Leipzig |
| Season: | 2017–18 |
| Ownertitle: | Chairman |
| Owner: | Oliver Mintzlaff |
| Chrtitle: | Sporting director |
| Chairman: | Ralf Rangnick |
| Manager: | Ralph Hasenhüttl |
| Stadium: | Red Bull Arena |
| League: | Bundesliga |
| League Result: | 6th |
| Cup1: | DFB-Pokal |
| Cup1 Result: | Second round |
| Cup2: | UEFA Champions League |
| Cup2 Result: | Group stage |
| Cup3: | UEFA Europa League |
| Cup3 Result: | Quarter-finals |
| League Topscorer: | Timo Werner (13) |
| Season Topscorer: | Timo Werner (21) |
| Highest Attendance: | 42,558 |
| Lowest Attendance: | 19,877 |
| Average Attendance: | 39,397 |
| Largest Win: | Dorfmerkingen 0–5 Leipzig, DFB-Pokal, 13 August 2017 |
| Largest Loss: | Hoffenheim 4–0 Leipzig, |
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| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
The 2017–18 RB Leipzig season was the 9th season in the football club's history and 2nd consecutive and overall season in the top flight of German football, the Bundesliga, having been promoted from the 2. Bundesliga in 2016. In addition to the domestic league, RB Leipzig also participated in the season's editions of the domestic cup, the DFB-Pokal, and the first-tier continental cup, the UEFA Champions League. This was the 8th season for Leipzig in the Red Bull Arena, located in Leipzig, Saxony, Germany. The season covers a period from 1 July 2017 to 30 June 2018.
| Player | From | Source | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 6 | DF |  Ibrahima Konaté | Sochaux | Transfer | Summer | 2022 | Free | ||
| 17 | FW | Bruma |  Galatasaray | Transfer | Summer | 2022 | €12,500,000 | ||
| 18 | FW | Ademola Lookman | Everton | Loan | Winter | 2018 | Free | ||
| 22 | GK | Philipp Köhn | VfB Stuttgart U19 | Transfer | Summer | 2021 | Free | ||
| 27 | MF |  Konrad Laimer | Red Bull Salzburg | Transfer | Summer | 2021 | €7,000,000 | ||
| 28 | GK | Yvon Mvogo | Young Boys | Transfer | Summer | 2021 | €5,000,000 | ||
| 29 | FW | Jean-Kévin Augustin | Paris Saint-Germain | Transfer | Summer | 2022 | €13,000,000 | ||
| 38 | FW | Federico Palacios | RB Leipzig II | Transfer | Summer | 2018 | Free | ||
| 40 | FW | Elias Abouchabaka | RB Leipzig U17 | Transfer | Summer | 2018 | Free | ||
| 44 | MF |  Kevin Kampl | Bayer Leverkusen | Transfer | Summer | 2021 | €20,000,000 | ||
| — | MF | Felix Beiersdorf | RB Leipzig II | Transfer | Summer | 2021 | Free | ||
| — | MF | Felix Beiersdorf | Wiener Neustadt | Loan Return | Winter | 2021 | Free | ||
| — | FW | Agyemang Diawusie | RB Leipzig U19 | Transfer | Summer | 2020 | Free | ||
| — | DF | Anthony Jung | FC Ingolstadt | Loan Return | Summer | 2019 | Free | ||
| — | MF |  Zsolt Kalmár | Brøndby IF | Loan Return | Summer | 2019 | Free | ||
| — | FW | Nicolas Kühn | RB Leipzig U17 | Transfer | Summer | 2018 | Free | ||
| — | DF | Atinc Nukan | Beşiktaş | Loan Return | Summer | 2020 | Free | ||
| — | FW | Nils Quaschner | VfL Bochum | Loan Return | Summer | 2020 | Free |
| Player | To | Source | ||||||
|---|---|---|---|---|---|---|---|---|
| 6 | MF | Rani Khedira | FC Augsburg | Transfer | Summer | Free | ||
| 19 | FW | Oliver Burke | West Bromwich Albion | Transfer | Summer | €15,200,000 | ||
| 21 | GK | Marius Müller | 1. FC Kaiserslautern | Loan | Summer | Free | ||
| 27 | FW | Davie Selke | Hertha BSC | Transfer | Summer | €8,000,000 | ||
| 33 | DF | Marvin Compper | Celtic | Transfer | Winter | €1,140,000 | ||
| 38 | FW | Federico Palacios Martinez | 1. FC Nürnberg | Transfer | Winter | Undisclosed | ||
| — | MF | Felix Beiersdorf | Wiener Neustadt | Loan | Summer | Free | ||
| — | MF | Felix Beiersdorf | Chemie Leipzig | Loan | Winter | Free | ||
| — | FW | Agyemang Diawusie | Wehen Wiesbaden | Loan | Summer | Free | ||
| — | DF | Anthony Jung | Brøndby IF | Loan | Summer | Free | ||
| — | MF | Zsolt Kalmár |  Dunajská Streda | Loan | Summer | Free | ||
| — | FW | Atinc Nukan | Beşiktaş | Loan | Summer | €200,000 | ||
| — | FW | Nils Quaschner | Arminia Bielefeld | Transfer | Summer | Undisclosed |
See main article: 2017–18 Bundesliga.
See main article: 2017–18 DFB-Pokal.
See main article: 2017–18 UEFA Champions League.
See main article: 2017–18 UEFA Europa League.
See main article: 2017–18 UEFA Europa League knockout phase.
|-! colspan=14 style=background:#dcdcdc; text-align:center| Goalkeepers|-! colspan=14 style=background:#dcdcdc; text-align:center| Defenders|-! colspan=14 style=background:#dcdcdc; text-align:center| Midfielders|-! colspan=14 style=background:#dcdcdc; text-align:center| Forwards|-! colspan=14 style=background:#dcdcdc; text-align:center| Players transferred out during the season