Many people believe most property in Whistler is held by out of country buyers. Truth be told the purchases in Whistler are overwhelmingly from the Sea to Sky corridor and Greater Vancouver area. The US comes in at 10% this year and are mostly from the Greater Seattle area up to Blaine.
The bulk of the out of country owners are in the condo hotels in the Village & Blackcomb area so this could create the perception that there is a bigger foreign component.. Buyers in Whistler purchase because they love Whistler and spend time in the resort. The graph below from 2016 sales data shows the source of buyers. Any other questions don't hesitate to contact me.