Festival dijadwalkan dari 27 Jun hingga 08 Jul 2012 (11 hari).
Summerfest berlangsung di Milwaukee, United States. Berikut adalah alamat lengkap festival: Henry Maier Festival Park; Milwaukee, Wisconsin, United States
Imagine Dragons, Iron Maiden, Scorpions, Big Time Rush, twenty one pilots, Zac Brown Band, Foo Fighters, Skillet, Alice Cooper, Tiësto, Aerosmith, ZZ Top, Brantley Gilbert, Death Cab for Cutie, Hollywood Undead.
Genre dan sub-genre yang paling populer dari edisi sebelumnya adalah:
rock
pop
hip hop
alternative rock
alternative
indie
indie rock
hard rock
indie pop
pop rock
classic rock
rnb
metal
southern rock
acoustic
dance
post-grunge
blues rock
electronica