Mark O'Connor is listed in the credits for the following albums:
| Year | Artist | Album | Role |
|---|---|---|---|
| 1987 | Michael Card | The Final Word | Violin |
| 1988 | Carman | Live! Radically Saved | Fiddle |
| 1988 | Steven Curtis Chapman | Real Life Conversations | Mandolin, Mandola |
| 1988 | Amy Grant | Lead Me On | Mandolin, Violin, Viola |
| 1990 | Bruce Carroll | Great Exchange | Fiddle |
| 1990 | Buddy Greene | Sojourner's Song | Mandola, Mandolin, Fiddle, Drums |
| 1991 | Bruce Carroll | Sometimes Miracles Hide | Fiddle |
| 1992 | Amy Grant | Home for Christmas | Violin |
| 1994 | Amy Grant | House of Love | Violin |
| 1997 | Bruce Carroll | For The Record | Mandolin |
