It started on 29 September 2018 with the first round of the regular season and ended on 21 June 2019 with the finals.

Real Madrid defended successfully the title and conquered its second consecutive league, 35th overall.

A total of 18 teams contested the league, including 16 sides from the 2017–18 season and two promoted from the 2017–18 LEB Oro.

On 30 September 2018, just in the first round and coming back Cafés Candelas Breogán 12 years later to the Liga ACB, their inaugural match against Divina Seguros Joventut was postponed due to problems with the main clock and the shot clocks.

Attendances include playoff games: Source: ACBNotes:1: Team played last season in LEB Oro.