Henry William Sprague "Peg" Cleghorn (March 11, 1890 – July 12, 1956) was a Canadian professional ice hockeyplayer from Westmount, Quebec who played 17 professional seasons between 1911 and 1929 for the Renfrew Creamery Kings and Montreal Wanderers in the National Hockey Association (NHA) and the Ottawa Senators,Montreal Canadiens and Boston Bruins in the National Hockey League (NHL). He was a member of three Stanley Cupchampionship teams, winning with the Senators in 1920 and 1921 as well as with the Canadiens in 1924. 

A tough and physical defenceman, Cleghorn had a reputation for violent play; he was twice charged with assault following on-ice incidents and was subject to efforts to have him banned from the NHL. His reputation made him an effective defender, and he used his offensive skill to become one of hockey's first offensive defencemen. At the time of his retirement, Cleghorn's 169 career goals were second most in professional hockey history by a defenceman. He was inducted into the Hockey Hall of Fame in 1958.