The Primeira Liga ([pɾiˈmɐjɾɐ ˈliɣɐ]; English: Premier League, also written as Liga Portugal 1), also known as Liga Portugal Bwin for sponsorship reasons, is the top level of the Portuguese football league system. Organised and supervised by the Liga Portugal, it is contested by 18 teams since the 2014–15 season, with the three lowest placed teams relegated to the Liga Portugal 2 and replaced by the top-three non-reserve teams from this division.
Founded in 1934 as Campeonato da Liga da Primeira Divisao, it was named Campeonato Nacional da Primeira Divisao from 1938 until 1999, when it was changed to its current naming. Over 70 teams have competed in the Primeira Liga, but only five have been crowned champions. Among them, the "Big Three" teams – Benfica (37 wins), Porto (30 wins) and Sporting CP (19 wins) – have won all but two Primeira Liga titles; the other winners are Belenenses (1945–46) and Boavista (2000–01).
The Primeira Liga has increased its reputation in recent years, occupying the sixth place of UEFA's national league ranking, as of 2021. It broke into the top five for the first time in the 2011–12 season, passing the French Ligue 1, one of the historical "big five" European leagues, for the first time since 1990. The Primeira Liga also reached a world ranking of fourth according to IFFHS's 2011 ranking.
This page also has a version in other languages : Примейра-лига (russian)