This year's headliners include the Foo Fighters, The Cure, The Postal Service, Death Cab for Cutie and Queens of the Stone Age.
Other bands include Turnstile, The Mars Volta, Mr. Bungle, Tegan and Sara, 100 Gecs, The Gaslight Anthem, Death Grips, AFI
Riot Fest takes place the weekend of September 15 in Douglass Park on the city's Southwest Side.
Tickets went on sale at 10 a.m. at riotfest.org/chicago/tickets/.