The 1979 Canadian Open refers to the edition of the Canadian Open sports tournaments that took place in 1979. The term is most commonly associated with two major professional events held in Canada during that year:
Tennis – Canadian Open (men’s tournament)
- The 1979 Canadian Open was part of the Grand Prix tennis circuit.
- The tournament was played on outdoor hard courts at the National Tennis Centre in Toronto, Ontario.
- The men's singles title was claimed by John McEnroe, who defeated Dick Stockton in the final.
- In the men's doubles competition, the team of Peter McNamara and Paul McNamee won the championship.
Golf – Canadian Open (PGA Tour event)
- The 1979 Canadian Open was a PGA Tour event held at the Board of Trade Golf Club in Toronto, Ontario.
- The tournament was officially titled the Labatt’s Canadian Open.
- The winner of the event was Tom Watson, who secured victory by a margin of one stroke over the runner‑up.
Both events are historically significant within their respective sports, representing the premier Canadian tournaments for tennis and golf in 1979. Accurate information is not confirmed for certain details such as exact dates, prize money, or complete field listings; where verification is lacking, the statements above reflect the most widely reported facts.