List of Boston Bruins head coaches

The Boston Bruins, a professional ice hockey team based in Boston, Massachusetts, has had 27 head coaches in its team history. The franchise is a member of the Northeast Division of the Eastern Conference of the National Hockey League (NHL). The franchise was founded in 1924 and entered the NHL as the first American-based expansion team. It is an Original Six team, along with the Toronto Maple Leafs, Detroit Red Wings, New York Rangers, Montreal Canadiens and Chicago Blackhawks. Its home arena is the 17,565-person capacity TD Banknorth Garden, where it has played since 1995, after leaving the Boston Garden.

Art Ross served four terms as the Bruins head coach. Ross, Cy Denneny, Lynn Patrick, Milt Schmidt and Mike Milbury have all been inducted to the Hockey Hall of Fame. Harry Sinden, Gerry Cheevers, Tom Johnson and Frank Patrick are in Hockey Hall of Fame inductees, and spent their entire coaching careers with the Bruins. Cooney Weiland, Dit Clapper, Terry O'Reilly, Steve Kasper, Mike O'Connell and Mike Sullivan also coached only for the Bruins.

Statistically, Tom Johnson was the best coach, with a winning percentage of .738. He is followed by Harry Sinden, who, averaging his two terms, had a winning percentage of .689. The worst coach statistically was Phil Watson, who, with a winning percentage of .268, only won 16 out of the 84 games he coached. Claude Julien, the current coach of the Bruins, took over after Lewis was dismissed in 2007.