Portugal in the Eurovision Song Contest 2018

Portugal was represented at the Eurovision Song Contest 2018 with the song "O jardim", written by Isaura and performed by Cláudia Pascoal. The Portuguese participating broadcaster, Rádio e Televisão de Portugal (RTP), organised the national final Festival da Canção 2018 in order to select its entry for the contest. In addition, RTP was also the host broadcaster and staged the event at the Lisbon Arena in Lisbon, after winning the previous edition with the song "Amar pelos dois" performed by Salvador Sobral. After two semi-finals and a final which took place in February and March 2018, "O jardim" performed by Cláudia Pascoal and featuring Isaura emerged as the winner of the Festival da Canção 2018 after achieving the highest score following the combination of votes from seven regional juries and a public televote.

As the host country, Portugal qualified to compete directly in the final of the Eurovision Song Contest. Portugal's running order position was determined by draw. Performing in position 8 during the final, Portugal placed twenty-sixth (last) out of the 26 participating countries with 39 points.