I decided to check out the athletes by their home province/territory.
Sadly no one from Newfoundland & Labrador, Prince Edward Island or any of the territories are competing.
Ontario - 171
British Columbia - 94
Quebec - 58
Alberta - 28
Nova Scotia - 8
Manitoba - 5
Saskatchewan - 3
New Brunswick - 1
Additionally two athletes (Eli Schenkal, fencing and Janine Beckie, football) are listed as other, both have hometowns in the United States.
Overall, BC has the highest amount of athletes relative to its population, even far surpassing Quebec in the overall count despite having about 50% more people.