The 2020 Categoría Primera B season (officially known as the 2020 Torneo BetPlay Dimayor season for sponsorship reasons) was the 31st season of the Categoría Primera B since its founding as Colombia's second division football league. The tournament started on 31 January and ended on 26 December 2020, with Atlético Huila winning their third title in the competition after defeating Cortuluá in the finals. The competition was suspended from 13 March to 17 September due to the COVID-19 pandemic.