The Portugal national football team (Portuguese: Seleção Portuguesa de Futebol) has represented Portugal in international men's football competition since 1921. The national team is controlled by the Portuguese Football Federation (FPF), the governing body for football in Portugal. Portugal's home matches are played at various stadiums throughout Portugal, and its primary training ground and technical headquarters, Cidade do Futebol, is located in Oeiras. The current head coach of the team is Fernando Santos and the captain is Cristiano Ronaldo, who also holds the team record for most caps and for most goals.

Portugal's first participation in a major tournament finals was at the 1928 Olympics, were they reached the quarter-finals. Thirty-eight years later, in 1966, Portugal managed to qualify for their first World Cup, which saw a team featuring Ballon d'Or winner Eusébio finish in third place. Portugal also made it to the semi-finals of the UEFA Euro 1984, losing to hosts and eventual winners France. Under the team's first golden generation in the 1990s, Portugal began consistently been present in all the finals stages of major tournament, reaching the semi-finals of Euro 2000 and Euro 2012. The Euro 2004 finals, which they lost to Greece on home soil, and the semi-finals of the 2006 World Cup, finishing in fourth place, the best result of the country in the World Cup since 1966. This was in great part due to the production of several players, such as Luís Figo, Rui Costa, Ricardo Carvalho, and Cristiano Ronaldo, who is regarded as one of the greatest players of all time.

In 2014, Fernando Santos was appointed as the new head coach for the national team. Two years later at Euro 2016, Santos led Portugal to its first ever major trophy, defeating hosts France in the finals. With the win, Portugal qualified and made its only appearance in the FIFA Confederations Cup held in Russia, where they finished in third place. Portugal qualified for and hosted the brand new 2018–19 Nations League finals where they triumphed, defeating the Netherlands and earning the second major tournament victory in three finals. Portugal also featured in the Olympic football tournament, and managed to achieve in the semi-finals of the 1996 Summer Olympic, finishing in fourth place.