See main article: 1998 du Maurier Open.
Three-time defending champion Monica Seles defeated Arantxa Sánchez Vicario in the final, 6 - 3, 6 - 2 to win the women's singles tennis title at the 1998 Canadian Open.[1] [2] [3] [4]
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. The top nine seeds received a bye to the second round.