The Peru First Division, officially known as Liga 1, is the top flight of association football in Peru. As of the 2025 season, there are 19 teams in the division of a league that operates on a system of promotion and relegation determined at the end of the season with the Segunda División (Liga 2). Seasons run from February to December, with each team playing 38 matches, 18 in the Apertura and 18 in the Clausura. The league is organized by Asociación Deportiva de Fútbol Profesional (ADFP).