A total of 10 teams contested the league, including 7 sides from the 2019 season, two relegated from the 2019 Liga 1, and one promoted from the 2019 Copa Perú.
On 11 November 2019, Cienciano were the first team to be promoted to Liga 1, ending a four-year run in the Peruvian Segunda División/Liga 2, after defeating Santos by 4−2.
[1] The second team to earn promotion to Liga 1 was play-offs winner Atlético Grau, after a goal-less draw against Sport Chavelines on 11 December 2019.
[5] The first team to be relegated from Liga 2 were Sport Victoria, expelled on 9 August 2019, due to their failure to pay their players.
It was also announced that the whole season would be played in Lima to avoid the constant travel between cities that clubs must do under normal circumstances.