Helium was an American alternative rock band fronted by Mary Timony. The band formed during the summer of 1992. Between 1992 and 1997, they released two full-length albums, three EPs and several singles.

Mary Bozana Timony is an American independent singer-songwriter, guitarist, keyboardist, bassist, and violist. She has been a member of the bands Helium, Autoclave, Wild Flag, and Hammered Hulls, and currently fronts Ex Hex.