Justina Mikulskytė (born 6 February 1996) is a Lithuanian tennis player. Mikulskytė has won four singles titles and 15 doubles titles on the ITF Women's Circuit. On 9 May 2022, she reached her best singles ranking of world No. 239, and on 18 July 2022, she peaked at No. 178 in the WTA doubles rankings. Playing for Lithuania Fed Cup team, Mikulskytė has a win–loss record of 15–9 (8–4 in doubles) as of July 2022.