The 2018–19 Dutch Basketball League (DBL) was the 59th season of the Dutch Basketball League, the highest professional basketball league in the Netherlands. The regular season started on 6 October 2018 and ended 30 April 2019. The best eight teams qualify for the which start on 2 May 2019. Donar was the defending champion. The season saw Landstede Zwolle win its first domestic championship, after defeating defending champions Donar in the finals.