The 2017 Categoría Primera A season (officially known as the 2017 Liga Águila season for sponsorship reasons) was the 70th season of Colombia's top-flight football league. Santa Fe were the defending champions having won the title in the 2016 season's Finalización tournament. The season started on 3 February and concluded on 17 December. In the Torneo Apertura, Atlético Nacional won its sixteenth title after beating Deportivo Cali in the finals, while in the Torneo Finalización Millonarios defeated crosstown rivals Santa Fe in the finals to win its fifteenth title.