Thomas Joseph McMahon | |
|---|---|
 Specialist Four Thomas McMahon | |
| Born | June 24, 1948 Washington, D.C., US |
| Died | March 19, 1969 (aged 20) Quang Tin Province, Republic of Vietnam |
| Place of burial | Mount Hope Cemetery, Lewiston, Maine |
| Allegiance | United States |
| Service | United States Army |
| Years of service | 1967–1969 |
| Rank | Specialist Four |
| Unit | Company A, 2nd Battalion, 1st Infantry Regiment, 196th Infantry Brigade, Americal Division |
| Battles / wars | Vietnam War † |
| Awards | Medal of Honor Purple Heart |
Thomas Joseph McMahon (June 24, 1948 – March 19, 1969) was a United States Army soldier and a recipient of the United States military's highest decoration—the Medal of Honor—for his actions in the Vietnam War.