William Steven "Will" Power (born March 1, 1981) is an Australian motorsports driver who currently competes in the IndyCar Series, driving for Team Penske. He is the 2014 IndyCar champion, and as of 2015 the most successful road and street course race winner in the series' history with 19 wins tied with Scott Dixon.

Willpower may refer to:

• Self-discipline, training and control of oneself and one's conduct, usually for personal improvement
• Self-control, the ability of a person to exert his/her will over the inhibitions of their body or self
• Volition (psychology), the process of making and acting on decisions
• Will (philosophy), a philosophical concept
• Will to power, a philosophical concept by Friedrich Nietzsche