William Milton "Riley" Hern (December 5, 1878 – June 24, 1929) was a Canadian professional ice hockey goaltender.

[3] He began his professional career with the Pittsburgh Keystones of the Western Pennsylvania Hockey League (WPHL) during the 1901–02 season.

[4] In the 1906–07 season, Hern joined the Montreal Wanderers of the Eastern Canadian Amateur Hockey Association (ECAHA).

[2][5] Hern died at Ross Memorial Pavilion of a heart ailment that had been ailing him for six weeks on June 24, 1929.

[7] Hern's grandson is Allan F. Nicholls, who played the role of Charlestown Chiefs captain Johnny Upton in the 1977 film Slap Shot.