1990 Canadian Open – Women's singles

Women's singles
1990 Canadian Open
Champion Steffi Graf
Runner-up Katerina Maleeva
Score6–1, 6–7, 6–3
Draw56 (8Q)
Seeds16

Steffi Graf defeated Katerina Maleeva in the final, 6–1, 6–7, 6–3 to win the women's singles tennis title at the 1990 Canadian Open.

Martina Navratilova was the reigning champion, but chose not to participate.