Ko shot 6-under-par 64 Sunday and repeated as the tournament winner by a comfortable five strokes. She is now seventh in the rankings, moving up 12 places.
Ko has retained her amateur status -- she won the 2012 U.S. Women's Amateur -- while appearing in 14 LPGA tournaments, She made the cut each time. She's won four tournaments.
There were no changes in the first six of the rankings -- Inbee Park, Stacy Lewis, Suzanne Pettersen, Choy Na-yeon, Ryu So-yeon and Karrie Webb, in that order -- and I.K. Kim, whose tie for fifth in the Canadian event was the highest finish for a Top 10 player, remains eighth.
The last U.S. stop on the 2013 LPGA calendar is this week with the Safeway Classic present by Coca-Cola in Portland, Ore.
The women's world golf rankings listing player's name, home country and ranking points average:
1. Inbee Park, South Korea, 12.78
2. Stacy Lewis, United States, 9.43
3. Suzann Pettersen, Norway, 8.15
4. Choi Na-yeon, South Korea, 7.67
5. Ryu So-yeon, South Korea, 7.05
6. Karrie Webb, Australia, 6.12
7. Lydia Ko, New Zealand, 5.85
8. I.K. Kim, South Korea, 5.77
9. Feng Shanshan, China, 5.77
10. Catriona Matthew, Scotland, 5.58
Ray Liotta sues skin care company over use of likeness
Aaron Carter is still in love with Hilary Duff