| Personal information | |
|---|---|
| Nationality | American |
| Born | November 5, 1963 Plainfield, New Jersey |
| Sport | |
| Sport | Track |
| Event | 800 meters |
| College team | Villanova |
| Achievements and titles | |
| Personal best(s) | 800 meters: 1:43.92[1] 1500 meters: 3:44.8[1] Mile: 4:01.83[1] |
John Henry Marshall (born November 5, 1963) is a former middle-distance track athlete who specialized in the 800 meters. He competed for the United States at the 1984 Summer Olympics. He was married to former 800-meter runner Debbie Grant, with whom he has a son, Myles Marshall, who is also an 800-meter runner and competed for the US junior team in 2014.