 Bierk married Kathleen Mae Hunter in Freeport, Bahamas in 1967.Following his divorce from Hunter, Bierk married Elizabeth Lovett Aimers at Abercorn, Quebec in 1980.Bierk had eight children, Sebastian Bach, the former lead singer for the rock group Skid Row; Zac Bierk, a Canadian ice hockey player; Heather Dylan, a Canadian actress; Lisa Hare; Alexander Bierk; Jeffrey Bierk; Nicholas Bierk; and Charles Bierk.