| Alternative Name | The Big Thing The Chicago Transit Authority The Big Thing (1967–68) The Chicago Transit Authority (1968–69) |
| Group Members | Robert Lamm Lee Loughnane James Pankow Walter Parazaider Jason Scheff Tris Imboden Keith Howland Lou Pardini Walfredo Reyes, Jr. Walfredo Reyes Jr. Ray Herrmann Neil Donell Brett Simons Ramon Yslas |
| Past Group Members | Danny Seraphine Peter Cetera Terry Kath Laudir de Oliveira Donnie Dacus Chris Pinnick Bill Champlin Dawayne Bailey Drew Hester Daniel de los Reyes Jason Scheff Tris Imboden Bruce Gaitsch Jeff Coffey |
| Music Genre(s) | Rock soft rock jazz rock pop rock |
| Music Genre | Rock Pop/Rock |
| Origin | Chicago, Illinois, United States |
| Year(s) Active | 1967–present |
| Record Label | Columbia Warner Bros. Full Moon Rhino Reprise Balkanton Melodiya Chicago Records/Chicago Records II Frontiers Records |
| Official Websites | chicagotheband.com |
| Associated Acts | The Beach Boys The Doobie Brothers Earth, Wind & Fire Sons of Champlin Honk Toto America Rufus David Foster |
Chicago is an American rock band formed in 1967 in Chicago, Illinois, calling themselves the Chicago Transit Authority in 1968 before shortening the name in 1969. The self-described "rock and roll band with horns" blended elements of classical music, jazz, R&B, and pop music. They produced numerous top-40 hits over two decades, and continue to record and perform live.
