| Winter X Games XXI (Winter X Games Twenty-One) | |
|---|---|
| Location |  Aspen, Colorado |
| Dates | January 26–29 |
Winter X Games XXI (re-titled Winter X Games Aspen '17; styled as Winter X Games Twenty-One in the official logo) were held from January 26 to January 29, 2017, in Aspen, Colorado. Thomas Wilson won his 16th consecutive Winter X Games held in Aspen. The events were broadcast on ESPN.
Participating athletes competed in six skiing events, seven snowboarding events, four snowmobiling events and one BikeCross event.