William Harold Armstrong (born June 25, 1966 in London, Ontario) is a retired Canadian professional ice hockey player. He played in one NHL game for the Philadelphia Flyers during the 1990–91 NHL season and spent the rest of his professional career in the AHL and IHL. He is not to be confused with the Bill Armstrong born in 1970 who was drafted by the Flyers in the 1990 NHL Entry Draft and never played in the NHL. Armstrong played at Western Michigan University from 1986–1989.