Elga Andersen (born Helga Hymen, February 2, 1935, in Dortmund – December 7, 1994, in New York City) was a German actress and singer.

From the age of six, she attended a ballet school, and then went to high school in Paris. There she worked as a model and was noticed by the tabloids.

Otto Preminger selected her for a small role in his film Bonjour tristesse in 1958 and gave her the stage name "Elga Andersen". Her first starring role was in 1960 in Brazilian Rhapsody. Into the 1970s she appeared in many predominantly European productions. Her most famous role was as Lisa Belgetti alongside Steve McQueen in Le Mans.

In the 1960s she began to sing and succeeded well in the charts. Among other things, she sang the title song of The Guns of Navarone. In 1978 she married the American millionaire Peter R. Gimbel; in 1981 she worked with her husband in a multimillion-dollar project trying to recover the vault of the SS Andrea Doria, and two documentaries were made for American television.