The 20-year-old overnight leader hit a seven-under-par 65 on Sunday to claim a four-shot victory.

Henderson shot four consecutive birdies on the back nine on the way to her seventh LPGA title.

Jocelyne Bourassa was the last Canadian to win the national championship, in 1973.

Henderson was serenaded with the Canadian national anthem by fans following her victory.

It is her second tournament win of the year following victory at the Lotte Championship in Hawaii in April.

American teenager Angel Yin finished second, while England's Bronte Law shot a final-round 70 to finish on 11 under.