Portugal was represented at the Eurovision Song Contest 1984 with the song "", written and performed by Maria Guinot. The Portuguese participating broadcaster, (RTP), selected its entry at the 1984.
(RTP) held the 1984 at the Auditório Europa in Lisbon on 7 March 1984, hosted by Fialho Gouveia and Manuela Moura Guedes.https://eurovisionworld.com/national/portugal/festival-da-cancao-1984 The winner was chosen by an expert jury in two rounds of voting - the first to select the top 6 songs and the second to select the winner.
Doce represented Portugal in Eurovision in 1982. Two members of the group - Teresa Miguel and Fatima Padinha - also represented Portugal in Eurovision in 1978 with the group Gemini. Paulo de Carvalho and Fernando Tordo were both in the group 'Os Amigos' that represented Portugal in Eurovision in 1977. De Carvalho also represented Portugal in 1974 and Tordo did the same in 1973.
Guinot was the nineteenth and last performer on the night of the contest, following . At the close of voting, "Silêncio e tanta gente" had received 38 points, placing Portugal 11th of the 19. The Portuguese jury awarded its 12 points to .