| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Ernesto C.•Montemayor Rodríguez, Sr. |
| Used name | Ernesto•Montemayor, Sr. |
| Born | 26 November 1907 in Cerralvo, Nuevo León (MEX) |
| Measurements | 170 cm |
| NOC | Mexico |
Ernesto Montemayor, Sr. had the following podium finishes at major championships: 3rd in the 1951 Pan American Games 25 m rapid fire pistol team (with José Reyes Rodríguez and the non-Olympians Manuel Larrañaga and Miguel Lambarri).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1948 Summer Olympics | Shooting | MEX |
Ernesto Montemayor, Sr. | |||
| Rapid-Fire Pistol, 25 metres, Men (Olympic) | 14 | |||||
| 1952 Summer Olympics | Shooting | MEX |
Ernesto Montemayor, Sr. | |||
| Rapid-Fire Pistol, 25 metres, Men (Olympic) | 15 |