| John F. Showalter | |
| Other Names: | John Showalter |
| Occupation: | Television director, editor and producer |
| Years Active: | 1981–present |
John F. Showalter is an American television director and editor.
He is well known for his work on Without a Trace, The Mentalist and Supernatural.
Showalter's directing credits include Ghost Whisperer, House, Criminal Minds, Without a Trace, Supernatural, The Mentalist, Supergirl, and The Flash, as well as editing episodes of , Gideon's Crossing, Glory Days, Timeless, and The 100.[1]