The 2023 European Le Mans Series was the twentieth season of the Automobile Club de l'Ouest's (ACO) European Le Mans Series.
[1] The Portimão round was later postponed one week to alleviate a clash with the 2023 Petit Le Mans.
[3] On 11 April it was announced the 4 Hours of Imola would be postponed due to ongoing works on the pit lane and paddock areas.
[4][5] On 14 April, the 4 Hours of Imola were officially cancelled, with the Portimão round becoming a double-header to fill the void.
Entries in the LMP2 Pro-Am class, set aside for teams with a Bronze-rated driver in their line-up, are denoted with icons.