Nadejda Ostrovskaya, Belarusian tennis player
Nadejda Ostrovskaya (Belarusian: Надзея Астроўская; born 29 October 1980) is a Belarusian former tennis player.

She 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 WTA doubles rankings.

Playing for the Belarus Fed Cup team, Ostrovskaya has a win–loss record of 13–9.