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Chicago (band)

Chicago is an American rock band formed in Chicago, Illinois, in 1967.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Chicago is an American rock band formed in Chicago, Illinois, in 1967. Known for blending rock with a prominent horn section, the band has become one of the best-selling American music groups of all time and has recorded across several decades.

History

Chicago formed in 1967 and first performed under the name The Big Thing before becoming Chicago Transit Authority and then Chicago. The original members came together around a shared interest in mixing rock music with horn arrangements.

Musical style

The band is associated with jazz rock, rock, and later soft rock and pop rock material. Its horn section became one of its defining musical features.

Commercial success

Chicago is widely recognized as one of the best-selling American bands, with sales reported at more than 100 million records. It produced many hit singles and albums over multiple decades.

Legacy

Chicago is regarded as an influential American rock band because of its long career and its early use of horns in a rock setting. Its debut recording as Chicago Transit Authority was later added to the U.S. National Recording Registry.

Key facts

  • Chicago was formed in 1967 in Chicago, Illinois.
  • The band originally called itself The Big Thing, then Chicago Transit Authority, before shortening to Chicago.
  • Chicago is known for its horn-driven rock sound.
  • The group has sold more than 100 million records, making it one of the best-selling American bands.
  • Chicago remains active and has had a long-running, changing membership.
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Canadian context

Chicago has had long-standing popularity in Canada as part of the classic rock canon and touring circuit, making it a familiar act for Canadian listeners and concertgoers.

Frequently asked questions

When was Chicago formed?
Chicago was formed in 1967 in Chicago, Illinois.
What was Chicago’s original name?
The band first used the name The Big Thing, then Chicago Transit Authority, before becoming Chicago.
Who were the original members?
The original lineup included Terry Kath, Peter Cetera, Robert Lamm, Walter Parazaider, Danny Seraphine, James Pankow, and Lee Loughnane.
What is Chicago known for musically?
Chicago is known for combining rock with horn arrangements and later adding jazz rock and softer pop-oriented styles.
How successful has the band been?
Britannica describes Chicago as among the most popular American recording artists, with sales of more than 100 million records.
Is Chicago still active?
Yes. The band has continued performing and recording through later decades, though its lineup has changed over time.

References

  1. Wikipedia — https://en.wikipedia.org/wiki/Chicago_(band)
    Supports: Formation date, original names, founding members, early history
  2. Britannica — https://www.britannica.com/topic/Chicago-band
    Supports: Band description, sales figures, style, original members, historical significance
  3. Louder Sound — https://www.loudersound.com/features/chicago-band-story
    Supports: Early formation and horn-driven style