| Club: | Olympique de Marseille |
| Season: | 2017–18 |
| Chairman: | Jacques-Henri Eyraud |
| Manager: | Rudi Garcia |
| Stadium: | Stade Vélodrome |
| Capacity: | 67,394 |
| League: | Ligue 1 |
| League Result: | 4th |
| Cup1: | Coupe de France |
| Cup1 Result: | Quarter-finals |
| Cup2: | Coupe de la Ligue |
| Cup2 Result: | Round of 16 |
| Cup3: | UEFA Europa League |
| Cup3 Result: | Runners-up |
| League Topscorer: | Florian Thauvin (22) |
| Season Topscorer: | Florian Thauvin (25) |
| Highest Attendance: | 62,312 vs Red Bull Salzburg (26 April 2018) |
| Lowest Attendance: | 8,649 vs Konyaspor (14 September 2017) |
| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
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The 2017–18 season was Olympique de Marseille's 68th professional season since its creation in 1899 and 22nd consecutive season in the top flight. The club participated in Ligue 1, Coupe de France, Coupe de la Ligue and the UEFA Europa League.
See main article: List of French football transfers summer 2017. In:Out:[1]
See main article: 2017–18 Ligue 1.
See main article: 2017–18 Coupe de France.
See main article: 2017–18 Coupe de la Ligue.
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
| width=60 | Place | width=60 | Position | width=60 | Nation | width=60 | Number | width=170 | Name | width=150 | Ligue 1 | width=150 | Coupe de France | width=150 | Coupe de la Ligue | width=150 | Europa League | width=80 | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | FW |  | 26 | Florian Thauvin | 22 | 0 | 0 | 4 | 26 | ||||||||||
| 2 | FW | | 28 | Valère Germain | 9 | 1 | 1 | 7 | 18 | ||||||||||
| 3 | FW |  | 5 | Lucas Ocampos | 9 | 3 | 0 | 4 | 16 | ||||||||||
| 4 | FW | 11 | Kostas Mitroglou | 9 | 3 | 1 | 0 | 13 | |||||||||||
| 5 | MF | | 8 | Morgan Sanson | 9 | 1 | 0 | 2 | 12 | ||||||||||
| 6 | MF | | 10 | Dimitri Payet | 6 | 1 | 0 | 3 | 10 | ||||||||||
| 7 | FW |  | 14 | Clinton N'Jie | 7 | 1 | 0 | 1 | 9 | ||||||||||
| 8 | MF |  | 19 | Luiz Gustavo | 5 | 1 | 0 | 0 | 6 | ||||||||||
| 9 | Own goal | 1 | 0 | 0 | 2 | 3 | |||||||||||||
| 10 | DF | | 23 | Adil Rami | 1 | 0 | 0 | 1 | 2 | ||||||||||
| DF | 6 | Rolando | 1 | 0 | 0 | 1 | 2 | ||||||||||||
| 12 | MF | | — | Rémy Cabella | 1 | 0 | 0 | 0 | 1 | ||||||||||
| DF | | 18 | Jordan Amavi | 0 | 1 | 0 | 0 | 1 | |||||||||||
| MF | | 27 | Maxime Lopez | 0 | 0 | 0 | 1 | 1 | |||||||||||
| DF | 17 | Bouna Sarr | 0 | 0 | 0 | 1 | 1 | ||||||||||||
| DF |  | 2 | Hiroki Sakai | 0 | 0 | 0 | 1 | 1 | |||||||||||
| TOTALS | 80 | 12 | 2 | 28 | 122 | ||||||||||||||