Kumiko Iijima (飯島 久美子, Iijima Kumiko, born 22 October 1982) is a Japanese former tennis player. She played on the ITF Women's Circuit where she won four singles and 20 doubles titles. In May 2011, Iijima reached her highest WTA singles ranking of 182. On 9 July 2007, she peaked at No. 151 in the WTA doubles rankings. She was coached by Kimiyo Hatanaka.