Katerina Yioulaki (Greek: Κατερίνα Γιουλάκη, born Aikaterini Yiouvarlaki (Αικατερίνη Γιουβαρλάκη); 27 March 1938 – 9 June 2025) was a Greek actress. She studied at the Dramatic School at the National Theatre of Greece. Her first appearance in the theater was in 1959 with Dinos Iliopoulos in the work I kiria tou kiriou (Η κυρία του κυρίου). She felt that she marked her appearance in TV in the beginning in the 1970s in the show I kokoromiali (Η κοκορόμυαλη), in the mid-1980s with I kiria mas ( Η Κυρία μας) and in 1990–1992 in Retire (reh-tee-reh) with Giannis Dalianidis. She was awarded the Greek Theatrical Writers' Guild Award in 1996. She died on 9 June 2025, at the age of 87. Her death was announced after her remains were cremated on 13 June.