Tzeni Vanou (Greek: Τζένη Βάνου, born Eugenia Vrachnou; 10 February 1939 – 5 February 2014) was a Greek singer, born in Athens.
She had planned on studying physics, but she met her mentor, Greek composer Mimis Plessas, who persuaded her to become a singer.
She began her career in 1959 performing with the ERT orchestra.
In 1964, she won first prize in the Thessaloniki Song Festival.
During her last few months, she had undergone surgery to remove a tumor in her larynx.