| 1980 | Through Acceptance of the Mystery Peace | William Parker | | 2 |
| 1983 | Some Order, Long Understood | Wayne Horvitz - Butch Morris - William Parker | | 2 |
| 1987 | Vermont Spring 1986 | Marco Eneidi, William Parker, Dennis Charles | | 1 |
| 1994 | Zo | Matthew Shipp Duo with William Parker | | 2 |
| 1996 | Cama de terra | Ivo Perelman + Matthew Shipp, William Parker | | 1 |
| 1996 | Testimony | William Parker | | 2 |
| 1997 | 9 | Dorgon + William Parker | | 1 |
| 1997 | Sad Life | Ivo Perelman with Rashid Ali & William Parker | | 2 |
| 1998 | Authenticity | Joel Futterman, William Parker, Jimmy Williams | | 1 |
| 1998 | Broken/Circle | Dorgon + William Parker | | 1 |
| 1998 | Lifting the Sanctions | William Parker | | 1 |
| 1999 | DNA | Matthew Shipp Duo with William Parker | | 1 |
| 1999 | A Hero’s Welcome: Pieces for Rare Occasions | Alan Silva & William Parker | | 1 |
| 1999 | Cherry Box | Marco Eneidi, William Parker, Donald Robinson | | 1 |
| 2001 | 2nd Set | Agustí Fernández & William Parker | | 1 |
| 2001 | Piercing the Veil | William Parker & Hamid Drake | | 2 |
| 2001 | Song Cycle | William Parker | | 2 |
| 2002 | Eloping With the Sun | William Parker, Joe Morris, Hamid Drake | | 1 |
| 2003 | Songs for a Suffering World | David Budbill · William Parker · Hamid Drake | | 1 |
| 2004 | Brooklyn Calling | P & P | | 1 |
| 2005 | Evolving Silence, Vol. 1 | Hamid Drake, Albert Beger, William Parker | | 1 |
| 2005 | Luc’s Lantern | William Parker | | 1 |
| 2006 | Only | Beans feat. William Parker & Hamid Drake | | 1 |
| 2006 | Palm of Soul | Kidd Jordan, Hamid Drake, William Parker | | 1 |
| 2006 | Evolving Silence, Vol. 2 | Hamid Drake, Albert Beger, William Parker | | 1 |
| 2006 | Long Hidden: The Olmec Series | William Parker | | 2 |
| 2006 | Spirits Up Above | Tiziano Tononi, Daniele Cavallanti feat. William Parker, Luca Calabrese, Emanuele Parrini and Steve Piccolo | | 1 |
| 2006 | The Dream | Daniel Carter / William Parker / Federico Ughi | | 3 |
| 2007 | The Last Dances | Drake / Gahnold / Parker | | 1 |
| 2007 | Tamarindo | Tony Malaby / William Parker / Nasheet Waits | | 1 |
| 2007 | Corn Meal Dance | William Parker / Raining on the Moon | | 1 |
| 2007 | Feels Like It | Daniel Carter, Toby Kasavan, Mark Hennen, William Parker | | 1 |
| 2008 | Beyond Quantum | Anthony Braxton, Milford Graves & William Parker | 3 | 1 |
| 2008 | On Reade Street | Frode Gjerstad with William Parker & Hamid Drake | | 2 |
| 2009 | In the Shade of Sun | John Blum with Sunny Murray and William Parker | | 1 |
| 2009 | Temporary | William Parker, Giorgio Dini | | 1 |
| 2010 | Prism | Ninni Morgia & William Parker | | 1 |
| 2010 | Vertical Invaders | Tiziano Tononi featuring William Parker and Emanuele Parrini | | 1 |
| 2011 | We | Steve Cohn, William Parker, Tom Tedesco | | 1 |
| 2011 | Planetary Unknown | David S. Ware, Cooper-Moore, William Parker, Muhammad Ali | | 1 |
| 2011 | Crumbling in the Shadows Is Fraulein Miller’s Stale Cake | William Parker | | 2 |
| 2011 | Knives From Heaven | Matthew Shipp, William Parker, Beans, HPrizm | | 1 |
| 2011 | One Sunday | Ken Aldcroft / William Parker | | 1 |
| 2011 | What Shall We Do (Without You) | Hocus Pocus Lab Orchestra with William Parker | | 1 |
| 2012 | The Gowanus Session | Thollem / Parker / Cline | | 1 |
| 2013 | Serendipity | Perelman | Shipp | Parker | Cleaver | | 1 |
| 2013 | Vita brevis | Borah Bergman, Kidd Jordan, William Parker, Michael Wimberly | | 1 |
| 2014 | Book of Sound | Ivo Perelman | Matthew Shipp | William Parker | | 1 |
| 2014 | Alternating Current | Jeff Cosgrove / Matthew Shipp / William Parker | | 2 |
| 2015 | To Roy | Oliver Lake, William Parker | | 1 |
| 2015 | Song for a New Decade | Mikko Innanen with William Parker and Andrew Cyrille | | 1 |
| 2015 | For Those Who Are, Still | William Parker | | 1 |
| 2015 | Emanate | Daniel Carter, Gary Hassay & William Parker | | 1 |
| 2015 | Great Spirit | William Parker / Raining on the Moon | | 2 |
| 2016 | New Normal | Dave Cappello & Jeff Albert with William Parker | | 2 |
| 2016 | Stan’s Hat Flapping in the Wind | William Parker | | 2 |
| 2016 | The Art of the Improv Trio, Volume 4 | Ivo Perelman, William Parker, Gerald Cleaver | | 1 |
| 2016 | A Long Way Home | Gary Joseph Hassay, Tatsuya Nakatani, William Parker | | 1 |
| 2017 | Hope Cries for Justice | Patricia Nicholson & William Parker | | 2 |
| 2017 | Heptagon | Ivo Perelman, Matthew Shipp, William Parker, Bobby Kapp | | 2 |
| 2017 | Emptying the Self | Paula Shocron, William Parker, Pablo Díaz | | 1 |
| 2017 | What I Saw This Morning | William Parker, David Budbill | | 2 |
| 2018 | Lake of Light: Compositions for AquaSonics | William Parker | | 2 |
| 2018 | OPTION AUDIO 005 | William Parker | | 1 |
| 2018 | Flower in a Stained-Glass Window & The Blinking of the Ear | William Parker | | 2 |
| 2019 | Near Disaster | Jeff Cosgrove | Matthew Shipp | William Parker | | 1 |
| 2019 | Ineffable Joy | Ivo Perelman, Matthew Shipp, William Parker, Bobby Kapp | | 1 |
| 2020 | Gowanus Sessions II | Thollem/Parker/Cline | | 3 |
| 2020 | Welcome Adventure! Vol. 1 | Daniel Carter, Matthew Shipp, William Parker, Gerald Cleaver | | 3 |
| 2020 | Tales From | Frode Gjerstad / Fred Lonberg-Holm / William Parker / Steve Swell | | 2 |
| 2021 | Migration of Silence Into and Out of the Tone World, Volumes 1–10 | William Parker | | 2 |
| 2021 | Mayan Space Station | William Parker | | 3 |
| 2021 | Painters Winter | William Parker | 2 | 3 |
| 2021 | Re-Union | William Parker - Matthew Shipp | | 2 |
| 2021 | Music Frees Our Souls, Vol. 1 | Francisco Mela feat. Matthew Shipp and William Parker | | 4 |
| 2021 | El Templo | Paula Shocron / William Parker / Pablo Díaz | | 2 |
| 2021 | Village Mothership | Whit Dickey, William Parker, Matthew Shipp | | 3 |
| 2021 | No Joke! | William Parker & Patricia Nicholson | | 2 |
| 2022 | 2 Blues for Cecil | Andrew Cyrille, William Parker & Enrico Rava | | 1 |
| 2022 | Sparks | Eri Yamamoto, Chad Fowler, William Parker, Steve Hirsh | | 2 |
| 2022 | O Life, O Light, Vol. 1 | Zoh Amba feat. William Parker and Francisco Mela | | 2 |
| 2022 | Welcome Adventure! Vol. 2 | Daniel Carter, Matthew Shipp, William Parker, Gerald Cleaver | | 3 |
| 2022 | The Deep | Joel Futterman • William Parker • Chad Fowler • Steve Hirsh | | 1 |
| 2022 | Broken Unbroken | Chad Fowler, William Parker, Anders Griffen | | 1 |
| 2022 | Thinking Unthinking | Chad Fowler, William Parker, Anders Griffen | | 1 |
| 2022 | Live at Scholes Street Studio | Stephen Gauci, Francisco Mela, William Parker, Matthew Shipp | | 2 |
| 2022 | Alien Skin | Chad Fowler, Ivo Perelman, Zoh Amba, Matthew Shipp, William Parker & Steve Hirsh | | 2 |
| 2022 | The Gate | Dave Sewelson • William Parker • Steve Hirsh | | 1 |
| 2023 | Red Giraffe With Dreadlocks | William Parker | | 1 |
| 2023 | Music Frees Our Souls, Vol. 2 | Francisco Mela feat. Cooper-Moore and William Parker | | 1 |
| 2023 | O Life, O Light, Vol. 2 | Zoh Amba featuring William Parker and Francisco Mela | | 2 |
| 2023 | Shine Hear, Vol. 1 | Daniel Carter, Leo Genovese, William Parker, Francisco Mela | 1 | 1 |
| — | Blown Away | Philip Gibbs, Roy Campbell, Paul Dunmall, Daniel Carter, Paul Rogers, William Parker, Hamid Drake | | 1 |
| — | Going Through | Jeanne Lee, Billy Bang, Frank Lowe, William Parker, Dennis King Charles & ar penck | | 1 |
| — | Songs For A Suffering World | David Budbill, William Parker, Hamid Drake | | 1 |
