Lys Assia (born Rosa Mina Schärer; 3 March 1924, Rupperswil, Aargau, Switzerland) is a Swiss singer who won the first Eurovision Song Contest in 1956. When Assia was a young girl she was a dancer. In 1940, however, she stood in for a female singer. People who heard her singing liked it, so she changed from dancing to singing.

In 1956 she was the winner of the very first Eurovision Song Contest, in which she sang for Switzerland. She had also been in the German national final of that year and returned to the contest again for Switzerland in 1957 and 1958. Schärer married Johann Heinrich Kunz on 11 January 1957 in Zürich. Kunz died just nine months later after battling a serious illness.