| John Kelly | |
| Position: | Tackle |
| Number: | 75 |
| Birth Date: | 31 March 1944 |
| Birth Place: | Fort Lauderdale, Florida, U.S. |
| Height Ft: | 6 |
| Height In: | 3 |
| Weight Lbs: | 250 |
| High School: | Fort Lauderdale (FL) Dillard |
| College: | Florida A&M |
| Draftyear: | 1966 |
| Draftround: | 20 |
| Draftpick: | 295 |
| Pastteams: | |
| Statlabel1: | Games played |
| Statvalue1: | 16 |
| Pfr: | KellJo22 |
John Douglas "Big John" Kelly (March 31, 1944 – October 28, 2015) was an American football offensive lineman in the National Football League (NFL) for the Washington Redskins. He played college football at Florida A&M University and was drafted in the 20th round of the 1966 NFL draft as the 295th pick by the Washington Redskins.