Haymarket Riot is a Chicago-based post-punk/rock band that was formed in 1999 by Mike Bennett, Kevin J. Frank, Fred Popolo and Billy Smith.

On April 7, 2009, Haymarket Riot released its third full-length album titled Endless Bummer on CD and as a digital download.

[3] The LP edition was later released on September 29, 2009, with alternate artwork and a download card which contains 2 bonus tracks.

[4] Early sessions for Endless Bummer were recorded with Steve Albini at Electrical Audio in Chicago, IL March 8–9, 2008.

Haymarket Riot features or has featured ex-members of Gauge, Traluma, Radio Flyer, Big'N, Sweep The Leg Johnny, Six Of One Half Summers, Just A Fire, Neutrino, Orwell, Hubcap, The Sky Corvair, Dempsey, and the Traitors.