The 15-year-old South Korean-born New Zealander closed with a 5-under-par 67 for a three-stroke victory. She broke the age record of 16 set by Lexi Thompson last September in the Navistar LPGA Classic in Alabama, and was the first amateur winner since JoAnne Carner in the 1969 Burdine’s Invitational.

‘‘To break another record, or being in the history, it’s amazing, and it’s always awesome to be able to play with the pros,’’ Ko said.

In January, Ko won the New South Wales Open in Australia at 14 to become the youngest player to win a professional tour event, a mark broken by 14-year-old Brooke Henderson in June in a 36-hole Canadian Women’s Tour event in Quebec. Ko also won the US Women’s Amateur two weeks ago in Cleveland.

‘‘I didn’t cry after this one, but [after] that one I did cry,’’ Ko said, referencing the US Women’s Amateur. ‘‘Yeah, to me, US Amateur is a big event, and obviously this is a huge event, as well. But still, as an amateur winning one of the biggest amateur events, I feel like it was a better win — even though this one was awesome.’’

Ko finished at 13-under 275 at the Vancouver Golf Club, pulling away with birdies on five of the first six holes on the back nine. She opened with consecutive 68s and shot a 72 on Saturday to take a one-stroke lead into the final round.

Inbee Park shot a 69 to finish second.

US Women’s Open champion Na Yeon Choi, Chella Choi, and Jiyai Shin tied for third at 8 under. Na Yeon Choi had a 73, while Chella Choi and Shin shot 71.

European — At Gleneagles, Scotland, Paul Lawrie marked the official confirmation of his return to the European Ryder Cup team after 13 years with a resounding four-shot victory in the Johnnie Walker Championship.

The 43-year-old Lawrie, who started the final round leading by a stroke, shot 68 to finish with a 16-under 272 total on the rain-softened PGA National Course at Gleneagles that will host the 2014 Ryder Cup.

Brett Rumford (68) was second for his best finish in two years with 12 under. Maarten Lafeber (69), Romain Wattel (72), and Fredrik Andersson Hed (65) shared third at 11 under.

The win is Lawrie’s second tour win this season and the eighth of his career. He now holds the distinction of the second-longest period between his Ryder Cup debut (in 1999 at Brookline) and his appearance at Medinah next month.