The 1991 Canadian Open was a tennis tournament played on outdoor hard courts. It was the 102nd edition of the Canada Masters, and was part of the ATP Super 9 of the 1991 ATP Tour, and of the Tier I Series of the 1991 WTA Tour. The men's event took place at the Uniprix Stadium in Montreal, Canada from July 22 through July 28, 1991, and the women's event at the National Tennis Centre in Toronto, Ontario, Canada from August 5 through August 11, 1991.

Finals

Men's singles

Andrei Chesnokov defeated Petr Korda, 3–6, 6–4, 6–3

Women's singles

🇺🇸 Jennifer Capriati defeated 🇧🇬 Katerina Maleeva, 6–2, 6–3

Men's doubles

🇺🇸 Patrick Galbraith / 🇺🇸 Todd Witsken defeated 🇨🇦 Grant Connell / 🇨🇦 Glenn Michibata, 6–4, 3–6, 6–1

Women's doubles

Larisa Savchenko-Neiland / Natalia Zvereva defeated Claudia Kohde-Kilsch / Helena Suková 1–6, 7–5, 6–2