The voting for the 2021 NFL Assistant Coach of the Year selected by The Associated Press in balloting by a nationwide panel of the media:
| Dan Quinn, Dallas DC | 31 | |
| Leslie Frazier, Buffalo DC | 4 | |
| Dennis Allen, New Orleans DC | 2 | |
| Jeff Stoutland, Philadelphia OL | 2 | |
| Josh McDaniels, New England OC | 2 | |
| Rich Bisaccia, Las Vegas | ST | 2 |
| Byron Leftwich, Tampa Bay | OC | 2 |
| DeMeco Ryans, San Francisco DC | 1 | |
| Joe Barry, Green Bay DC | 1 | |
| Adam Stenavich, Green Bay OL | 1 | |
| Brian Daboll, Buffalo OC | 1 | |
| Kellen Moore, Dallas OC | 1 |
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