My Own Pal takes Tom Mix out of his customary western surroundings and plunks him in the middle of New York City.
| Actor | Role |
|---|---|
 Tom MixTom O'Hara | Tom O'Hara |
 Olive BordenAlice Deering | Alice Deering |
 Tom SantschiAugust Deering | August Deering |
 Virginia MarshallJill | Jill |
 Ben BardBaxter Barton | Baxter Barton |
 William ColvinJud McIntire | Jud McIntire |
| VVirginia WarwickMolly | Molly |
 Jay HuntClown | Clown |
 Hedda NovaMrs. Jud McIntire | Mrs. Jud McIntire |
 Tom McGuirePat McQuire | Pat McQuire |
 Helen LynchTrixie Tremaine | Trixie Tremaine |
| JJack RollensSlippery Sam (as Jacques Rollens) | Slippery Sam (as Jacques Rollens) |
 Jack KennyMinor Role (uncredited) | Minor Role (uncredited) |