List of The Guess Who members
The Guess Who is a Canadian rock band, originating as the Guess Who? in 1966, and adopting the name The Guess Who in 1968. They were most successful from 1969 to 1975, under the leadership of singer/keyboardist Burton Cummings. During that period they released eleven studio albums, all of which reached the charts in Canada and the United States; their 1970 album American Woman reached no. 1 in Canada and no. 9 in the United States, and five other albums reached the top ten in Canada. They also achieved five number one singles in Canada and two in the United States.
During the 1969-1975 era prior to the band's breakup, Cummings and drummer Garry Peterson were the only consistent members; they were joined by five guitarists and two bassists during those years. Cummings ended the band in 1975 and embarked on a solo career. In the following decades, Cummings and original guitarist Randy Bachman led several one-time reunion shows or short commemorative tours with various former members.
In 1978, original bassist Jim Kale organized a separate version of the band without the consent of Bachman and Cummings. Kale's band featured a frequently changing cast of musicians, sometimes including Peterson, and these lineups frequently toured on the nostalgia circuit. In 2024, Bachman and Cummings announced that they had gained control of the band's name, and disallowed Peterson from continuing to tour under the name. In June 2025, Bachman and Cummings announced they would perform as The Guess Who? at several shows in 2026.
This list article does not include musicians who filled in temporarily for official members or members of the version of the band led by Kale and Peterson.
The Guess Who members (1962-1975)
| Image | Name | Years active | Instruments | Release contributions |
| Garry Peterson | 1962–1975 | all Classic Era releases | ||
| Jim Kale | 1962–1972 | all releases from Shakin' All Over to Live at the Paramount | ||
| Randy Bachman | all releases from Shakin' All Over to American Woman | |||
| Chad Allan | 1962–1966 | |||
| Bob Ashley | 1962–1966 | |||
| Burton Cummings | all releases from It's Time to Power in the Music | |||
| Bruce Decker | 1966–1966 | rhythm guitar | none | |
| Kurt Winter | 1970–1974 | all releases from Share the Land to Road Food | ||
| Greg Leskiw | 1970–1972 | |||
| Donnie McDougall | 1972–1974 | |||
| Bill Wallace | 1972–1975 | |||
| Domenic Troiano | 1974–1975 |