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