Portugal won the Eurovision Song Contest 2017 with the song "Amar pelos dois", written by Luísa Sobral. The song is performed by Salvador Sobral. The Portuguese broadcaster Rádio e Televisão de Portugal (RTP) organised the national final Festival da Canção 2017 in order to select the Portuguese entry for the 2017 contest in Kiev, Ukraine. After 16 songs competed through two semi-finals and a final, "Amar pelos dois" performed by Salvador Sobral emerged as the winner, ultimately being selected by a 50/50 combination of votes from jury members made up of music professionals and a public telephone vote.

Portugal was drawn to compete in the first semi-final of the Eurovision Song Contest which took place on 9 May 2017. "Amar pelos dois" ended up winning the 2017 Eurovision Song Contest with 758 points, giving the country its first win since it began participating in 1964.

Prior to the 2017 Contest, Portugal had participated in the Eurovision Song Contest forty-eight times since its first entry in 1964. Its highest placing in the contest, to this point, has been sixth place, which the nation achieved in 1996 with the song "O meu coração não tem cor" performed by Lúcia Moniz. To this point, Portugal has been competing in the contest the longest time without having achieved victory. Since semi-finals were introduced into the contest in 2004, Portugal has failed to reach the final eight times. After failing to qualify to the final in 2015 with Leonor Andrade performing the song "Há um mar que nos separa", the country briefly withdrew from the contest in 2016. RTP confirmed Portugal's return to the competition on 4 August 2016.

The Portuguese broadcaster for the 2017 Contest, who broadcasts the event in Portugal and organises the selection process for its entry, will be Rádio e Televisão de Portugal (RTP). Portugal has most commonly selected their entry through the national final Festival da Canção except between 2003 and 2005 where the broadcaster used internal selections and the talent competition Operação triunfo to select their entry. The broadcaster organized the 2017 edition of Festival da Canção in order to select the Portuguese entry for the 2017 Eurovision Song Contest.

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