Kalia Antoniou (Greek: Κάλια Αντωνίου; born 6 April 2000) is a Cypriot swimmer.

She competed in the women's 50 metre backstroke event at the 2017 World Aquatics Championships.

[2][3] In 2019, she won four silver medals at the Games of the Small States of Europe held in Budva, Montenegro.

[4] In 2019, she also represented Cyprus at the World Aquatics Championships held in Gwangju, South Korea.

This biographical article related to a Cypriot swimmer is a stub.