Rádio e Televisão de Portugal (RTP), a member of the European Broadcasting Union (EBU), were responsible for the selection process of their participation. Portugal used a national selection format, broadcasting a show entitled "Festival da Canção Junior", for their participation at the contests. This was a junior version of Festival da Canção, the national music competition organised by broadcaster RTP to choose the Portuguese entry for the Eurovision Song Contest.
Portugal withdrew from competing in , and returned in . They withdrew again in  due to the COVID-19 pandemic. Portugal returned in , where they achieved 11th place, their best result up to that point.