Antonia Ružić (born 20 January 2003) is a Croatian tennis player.
Ružić has a career-high singles ranking by the WTA of 132, achieved on 2 December 2024. She also has a career-high WTA doubles ranking of 565, reached on 2 December 2024. Ružić has won 10 singles titles on the ITF Women's Circuit.
Ružić made her Fed Cup debut for Croatia in 2020.
Making her WTA Tour debut as a qualifier at the 2024 Jasmin Open in Monastir, Tunisia, Ružić reached the quarterfinals with wins over fourth seed Nadia Podoroska and Lily Miyazaki, before losing to seventh seed Lucia Bronzetti.