Festival dijadwalkan dari 29 Jun hingga 10 Jul 2011 (11 hari).
Summerfest berlangsung di Milwaukee, United States. Berikut adalah alamat lengkap festival: Henry Maier Festival Park; Milwaukee, Wisconsin, United States
Maroon 5, Def Leppard, Dropkick Murphys, Styx, Eric Church, The Black Keys, Rise Against, Panic! at the Disco, Wiz Khalifa, Peter Gabriel, Brantley Gilbert, Katy Perry, Third Eye Blind, Hollywood Undead, Nicki Minaj.
Genre dan sub-genre yang paling populer dari edisi sebelumnya adalah:
rock
pop
punk
alternative
alternative rock
indie
hard rock
indie rock
classic rock
pop rock
emo
punk rock
post-grunge
metal
acoustic
dance
blues rock
pop punk
progressive rock