Tereza Mrdeža (born 14 November 1990) is a Croatian tennis player. She has won eight singles titles and four doubles titles on the ITF Women's Circuit. On 12 October 2015, she reached her best singles ranking of world No. 150. On 23 April 2018, she peaked at No. 163 in the doubles rankings. Playing for Croatia Fed Cup team, Mrdeža has a win–loss record of 5–4.