After their win in 1956, Switzerland continued with their format of a national final to select their entry for the 1957 contest.
Three artists competed to represent Switzerland: last year's winner Lys Assia; Jo Roland, who participated at the national final of 1956; and Gianni Ferraresi.
The winner was Lys Assia for the second year, with the song "L'enfant que j'étais". However, Assia could not repeat her victory in 1956, and came 8th with 5 points.
The Swiss entry was conducted at the contest by the musical director Willy Berking.