The Primeira Liga, 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: 1934
- Country: Portugal
- Confederation: UEFA
- Number of teams: 18
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