The Ontario Open Heritage Classic was a golf tournament on the Canadian Tour that was held in Ontario, Canada.

It was founded in 1999, three years after the long-standing Ontario Open was last played, and ran for four years, through 2002.

It was hosted at a different venue every year.

In the inaugural tournament, Arron Oberholser set a new Canadian Tour record for the largest winning margin when he finished 11 strokes ahead of Ian Leggatt and Tony Carolan.

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