| Club: | RC Lens |
| Season: | 2018–19 |
| Ownertitle: | Owner |
| Owner: | Amber Capital LP |
| Chrtitle: | President |
| Chairman: | Joseph Oughourlian |
| Mgrtitle: | Head coach |
| Manager: | Philippe Montanier |
| Stadium: | Stade Bollaert-Delelis |
| League: | Ligue 2 |
| League Result: | 5th |
| Cup1: | Coupe de France |
| Cup1 Result: | Round of 64 |
| Cup2: | Coupe de la Ligue |
| Cup2 Result: | Second round |
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| Prevseason: | 2017–18 |
| Nextseason: | 2019–20 |
The 2018–19 season was the 113th season in the existence of RC Lens and the club's fourth consecutive season in the second division of French football. In addition to the domestic league, Lens participated in this season's editions of the Coupe de France and the Coupe de la Ligue. The season was scheduled to cover the period from 1 July 2018 to 30 June 2019.
See main article: 2018–19 Ligue 2.
See main article: 2018–19 Coupe de France.
See main article: 2018–19 Coupe de la Ligue.