Twenty teams take part in the season, the top 18 teams in the relegation table of the previous season as well as the
2024 Primera B champions
Unión Magdalena, who were promoted after a one-year absence and runners-up
Llaneros, who were promoted for the first time in their history. Both teams clinched promotion on 14 December 2024, following the 2024 Primera B's Grand Final. The promoted teams replaced
Jaguares and
Patriotas, the bottom two teams in the
relegation table of the 2024 season, who were relegated to Primera B after nine and one year in the top flight, respectively. For this season,
Águilas Doradas returned to
Rionegro,
Antioquia to play their home matches, after the agreement with the
Sincelejo Municipality expired at the end of 2024 and was not renewed.
Stadia and locations ;Notes
Personnel and kits Managerial changes ;Notes ==Torneo Apertura==