| Period | Members | Releases |
| April 1976 – April 1979 | Lou Gramm – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing and lead vocals Ian McDonald – rhythm guitar, woodwinds, backing vocals Ed Gagliardi – bass, backing vocals Dennis Elliott – drums, percussion Al Greenwood – keyboards, synthesizers | Foreigner (1977) Double Vision (1978) The Very Best ... and Beyond (1992) Classic Hits Live (1993) 40 (2017) Live at the Rainbow '78 (2019) |
| April 1979 – September 1980 | Lou Gramm – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing and lead vocals Ian McDonald – rhythm guitar, woodwinds, backing vocals Rick Wills – bass, backing vocals Dennis Elliott – drums, percussion Al Greenwood – keyboards, synthesizers | Head Games (1979) The Very Best ... and Beyond (1992) Classic Hits Live (1993) 40 (2017) |
| September 1980 – May 1990 | Lou Gramm – lead vocals, percussion Mick Jones – lead and rhythm guitars, keyboards, backing vocals Rick Wills – bass, backing vocals Dennis Elliott – drums, percussion | 4 (1981) Agent Provocateur (1984) Inside Information (1987) The Very Best ... and Beyond (1992) Classic Hits Live (1993) 40 (2017) |
| Summer 1990 – July 1991 | Johnny Edwards – lead vocals, rhythm and lead guitars Mick Jones – lead and rhythm guitars, keyboards, backing vocals Rick Wills – bass, backing vocals Dennis Elliott – drums, percussion | Unusual Heat (1991) 40 (2017) |
| July – November 1991 | Johnny Edwards – lead vocals, rhythm and lead guitars Mick Jones – lead and rhythm guitars, keyboards, backing vocals Rick Wills – bass, backing vocals Dennis Elliott – drums, percussion Jeff Jacobs – keyboards, backing vocals | none |
| November 1991 – March 1992 | Johnny Edwards – lead vocals, rhythm and lead guitars Mick Jones – lead and rhythm guitars, keyboards, backing vocals Rick Wills – bass, backing vocals Jeff Jacobs – keyboards, backing vocals Larry Aberman – drums (touring) |
| March – May 1992 | Johnny Edwards – lead vocals, rhythm and lead guitars Mick Jones – lead and rhythm guitars, keyboards, backing vocals Rick Wills – bass, backing vocals Mark Schulman – drums, backing vocals Jeff Jacobs – keyboards, backing vocals |
| May – October 1992 | Lou Gramm – lead vocals, percussion Mick Jones – lead and rhythm guitars, keyboards, backing vocals Bruce Turgon – bass, backing vocals Mark Schulman – drums, backing vocals Jeff Jacobs – keyboards, backing vocals | The Very Best ... and Beyond (1992) |
| October 1992 – spring 1993 | Lou Gramm – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Bruce Turgon – bass, backing vocals Mark Schulman – drums, backing vocals Jeff Jacobs – keyboards, backing vocals | none |
| Spring 1993 – early 1995 | Lou Gramm – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Scott Gilman – rhythm guitar, woodwinds, backing vocals Bruce Turgon – bass, backing vocals Mark Schulman – drums, backing vocals Jeff Jacobs – keyboards, backing vocals | Live at Deer Creek (1994) Mr. Moonlight (1994) 40 (2017) |
| January 1995 – April 1998 | Lou Gramm – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Bruce Turgon – bass, backing vocals Ron Wikso – drums Jeff Jacobs – keyboards, backing vocals | none |
| April 1998 – summer 2000 | Lou Gramm – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Bruce Turgon – bass, backing vocals Brian Tichy – drums Jeff Jacobs – keyboards, backing vocals |
| Summer 2000 – early 2002 | Lou Gramm – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Bruce Turgon – bass, backing vocals Mark Schulman – drums, backing vocals Jeff Jacobs – keyboards, backing vocals |
| May 2002 – early 2003 | Lou Gramm – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Bruce Turgon – bass, backing vocals Denny Carmassi – drums Jeff Jacobs – keyboards, backing vocals | All Access Tonight: Live in Concert 25 (2003) |
| Band on hiatus early 2003 – July 2004 |
| July 2004 | Chas West – lead vocals Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Jeff Pilson – bass, backing vocals Jason Bonham – drums Jeff Jacobs – keyboards, backing vocals | none |
| March 2005 – December 2007 | Kelly Hansen – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Jeff Pilson – bass, backing vocals Jason Bonham – drums Jeff Jacobs – keyboards, backing vocals | Extended Versions (2006) Alive & Rockin' (2007) Live: Soundstage (2009) |
| December 2007 – early 2008 | Kelly Hansen – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Jeff Pilson – bass, backing vocals Jason Bonham – drums Paul Mirkovich – keyboards | none |
| Early – August 2008 | Kelly Hansen – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Jeff Pilson – bass, backing vocals Jason Bonham – drums Michael Bluestein – keyboards, backing vocals |
| August – late 2008 | Kelly Hansen – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Jeff Pilson – bass, backing vocals Bryan Head – drums Michael Bluestein – keyboards, backing vocals |
| Late 2008 – May 2010 | Kelly Hansen – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Jeff Pilson – bass, backing vocals Brian Tichy – drums Michael Bluestein – keyboards, backing vocals | Can't Slow Down (2009) 40 (2017) |
| May 2010 – March 2011 | Kelly Hansen – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Jeff Pilson – bass, backing vocals Jason Sutter – drums, backing vocals Michael Bluestein – keyboards, backing vocals | Can't Slow Down ... When It's Live! (2010) |
| March – September 2011 | Kelly Hansen – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Jeff Pilson – bass, backing vocals Mark Schulman – drums, backing vocals Michael Bluestein – keyboards, backing vocals | Feels Like the First Time: Live in Chicago (2011) Acoustique (2011) |
| September 2011 – August 2012 | Kelly Hansen – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals (not touring for health reasons) Bruce Watson – lead and rhythm guitars, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Jeff Pilson – bass, backing vocals Mark Schulman – drums, percussion Michael Bluestein – keyboards, backing vocals | none |
| September 2012 – May 2021 | Kelly Hansen – lead vocals, percussion Mick Jones – lead guitar, keyboards, backing vocals Bruce Watson – rhythm and lead guitars, backing vocals Thom Gimbel – rhythm guitar, woodwinds, backing vocals Jeff Pilson – bass, backing vocals Chris Frazier – drums, percussion Michael Bluestein – keyboards, backing vocals | The Very Best of Foreigner 4 & More (2014) In Concert: Unplugged (2016) "The Flame Still Burns" (2016) 40 (2017) Foreigner with the 21st Century SymphonyOrchestra & Chorus (2018) Live in Concert (2019) |
| May 2021 – May 2025 | Kelly Hansen – lead vocals, percussion Mick Jones – lead and rhythm guitars, keyboards, backing vocals (not touring since 2023 for health reasons) Bruce Watson – lead and rhythm guitars, backing vocals Luis Maldonado – rhythm and lead guitars, backing vocals, bass Jeff Pilson – bass, backing vocals, keyboards Chris Frazier – drums, percussion Michael Bluestein – keyboards, backing vocals | none |
| May 2025 – present | Lou Gramm – lead vocals, percussion Mick Jones – lead and rhythm guitars, keyboards, backing vocals (not touring since 2023 for health reasons) Bruce Watson – lead and rhythm guitars, backing vocals Luis Maldonado – lead vocals, rhythm and lead guitars, bass Jeff Pilson – bass, backing vocals, keyboards Chris Frazier – drums, percussion Michael Bluestein – keyboards, backing vocals |