Festival dijadwalkan dari 15 Jun hingga 17 Jun 2012 (2 hari).
Hellfest berlangsung di Clisson, France. Berikut adalah alamat lengkap festival: Rue du Champ Louet 44190 Clisson, France
Megadeth, Mötley Crüe, Dropkick Murphys, Ozzy Osbourne, Within Temptation, Lamb of God, Lynyrd Skynyrd, Amon Amarth, Trivium, August Burns Red, Machine Head, Steel Panther, Uriah Heep, Behemoth, Cannibal Corpse, Rival Sons, Insomnium, Black Label Society, Dimmu Borgir, Obituary.
Genre dan sub-genre yang paling populer dari edisi sebelumnya adalah:
rock
heavy metal
punk
metal
hardcore
death metal
black metal
hard rock
thrash metal
hardcore punk
metalcore
brutal death metal
grindcore
stoner rock
doom metal
experimental
progressive metal
stoner metal
melodic death metal