Portugal in the Eurovision Song Contest 2021

Portugal was represented at the Eurovision Song Contest 2021 with the song "Love Is on My Side" written by Pedro "Tatanka" Taborda, and performed by the band the Black Mamba. The Portuguese participating broadcaster, Rádio e Televisão de Portugal (RTP), organised the national final Festival da Canção 2021 in order to select its entry for the contest. After two semi-finals and a final which took place in February and March 2021, "Love Is on My Side" performed by the Black Mamba emerged as the winner after achieving the joint highest score following the combination of votes from seven regional juries and a public televote, winning the tiebreaker due to having more points from the latter.

Portugal was drawn to compete in the second semi-final of the Eurovision Song Contest which took place on 20 May 2021. Performing during the show in position 12, "Love Is on My Side" was announced among the top 10 entries of the second semi-final and therefore qualified to compete in the final on 22 May. It was later revealed that Portugal placed fourth out of the 17 participating countries in the semi-final with 239 points. In the final, Portugal performed in position 7 and placed twelfth out of the 26 participating countries with 153 points.