By October 1980, it looked as though 21 countries were planning to take part, the largest number so far, but then declared that they were no longer interested. They finished seventh. also returned to the competition after a five-year absence. decided not to enter due to lack of interest, while declined to take part after their debut entry the year before. Morocco's king,
Hassan II, "reportedly withdrew Rabat's participation from the contest the following year, saying that the country will never participate again". The draw for the running order took place on 14 November 1980, with it being confirmed that there was a total of 20 entrants. Many previous contestants returned to the contest this year – notably
Jean-Claude Pascal, who had won the contest for , although he could only manage 11th place this time.
Peter, Sue and Marc returned for the fourth time, after representing , , and . Performing again for Switzerland, they remain the only act to sing Contest entries in four different languages (French, English, German and, on this occasion, Italian). Other returnees were
Marty Brem who had represented as part of Blue Danube,
Tommy Seebach who had represented –with
Debbie Cameron providing him backing vocals in 1979–, and
Björn Skifs who had represented .
Cheryl Baker, a member of
Bucks Fizz, had represented the as part of
Co-Co, while
Maxi, a member of
Sheeba, had represented as a solo artist. In addition,
Ismeta Dervoz, who had represented as part of
Ambasadori, and
Anita Skorgan, who had represented and , provided backing vocals for the same country. ==Format==