Nadejda Ostrovskaya (Belarusian: ?????? ??????????; born 29 October 1980) is a former Belarusian tennis player.
Ostrovskaya won ten singles and 19 doubles titles on the ITF Women's Circuit.
On 15 January 2001, she reached her best singles ranking of world No.
96.
On 15 April 2002, she peaked at No.
78 in the doubles rankings.
Playing for Belarus at the Fed Cup, Ostrovskaya has a win–loss record of 13–9.