Agni Baltsa (Greek: Aγνή Mπάλτσα; also known as Agnes Baltsa; born 19 November 1944) is a leading Greek mezzo-soprano singer. Baltsa was born in Lefkada. She began playing piano at the age of six, before moving to Athens in 1958 to concentrate on singing. She graduated from the Greek National Conservatoire in 1965 and then travelled to Munich to continue studying on a Maria Callas scholarship. She starred in the Austrian film Duett in 1992, playing an opera singer.