William Haislip "Billy" Squier (born May 12, 1950) is an American rock musician. Squier had a string of arena rock hits in the 1980s. He is best known for the song "The Stroke", from his 1981 Triple Platinum breakout album release Don't Say No.

Other hits include "In the Dark", "Rock Me Tonite", "The Big Beat", "Lonely Is the Night", "Everybody Wants You" and "Emotions in Motion".