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

Portugal's first participation in a major tournament finals was at the 1966 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 featuring in the European Championship and World Cup; they made the semi-finals of the 2006 World Cup, finishing in fourth place, along with placing as runners-up at Euro 2004 as hosts, and reaching the semi-finals of Euro 2000 and Euro 2012. This was in great part due to the production of several world class players, such as fellow Ballon d'Or winners Luís Figo and Cristiano Ronaldo.

In 2016, Portugal won its first-ever major trophy, Euro 2016, 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 2019 Nations League finals where they triumphed, defeating the Netherlands and earning their second major tournament victory in three finals. Portugal also appeared in the Olympic football tournament, and made it to the semi-finals at the 1996 Summer Olympics in Atlanta, finishing in fourth place.

Portugal is colloquially referred to as the Seleção das Quinas (a synecdoche based on the flag of the country) and has notable rivalries with Brazil, due to shared cultural traits and heritage, France, due to several important meetings between the two teams at the Euros and World Cup, and Spain, known as A Guerra Ibérica in Portuguese or The Iberian War in English, with the rivalry between two countries going back to 1581.