Mark Harmon is listed in the credits for the following albums:
| Year | Artist | Album | Role |
|---|---|---|---|
| 1990 | Michael Roe | More Miserable Than You'll Ever Be | Bass |
| 1990 | Seventy Sevens | Sticks and Stones | Bass |
| 1991 | Seventy Sevens | Eighty Eight | Bass |
| 1992 | Seventy Sevens | Pray Naked | Songwriter, Bass, Electronic Percussion, Vocals |
| 1995 | Love Coma | Language of Fools | Bass Guitar |
| 1995 | Seventy Sevens | Tom Tom Blues | Songwriter, Bass, Background Vocals |
| 1995 | Michael Roe | Safe As Milk | Songwriter, Bass, Electronic Percussion, Keyboards |
| 1995 | Seventy Sevens | Drowning with Land in Sight | Songwriter, Bass, Keyboards, Vocals |
| 1996 | Michael Roe | The Boat Ashore | Bass |
| 1999 | Michael Roe | Safe As Milk Live: Cornerstone 1997 | Bass, Background Vocals |
| 2000 | Various Artists | When Worlds Collide: A Tribute to Daniel Amos | Producer, Bass, Vocals |
| 2001 | Seventy Sevens | A Golden Field Of Radioactive Crows | Songwriter, Basses, Guitars, Keyboards, Vocals |
| 2003 | Terry Scott Taylor | All Day Sing & Dinner on the Ground | Electric and Standup Bass, Percussion |
