| Roles | Competed in Olympic Games | 
|---|---|
| Sex | Male | 
| Full name | Clemente•Mejía Ávila | 
| Used name | Clemente•Mejía | 
| Born | 23 November 1928 in Acapulco, Guerrero (MEX) | 
| Died | 28 March 1978 in Acapulco, Guerrero (MEX) | 
| Measurements | 183 cm / 75 kg | 
| NOC |   Mexico | 
Clemente Mejía had the following podium finishes at major championships: 3rd in the 1951 Pan American Games 3×100 metre medley (with Alberto Isaac and the non-Olympian Luis Spamer), 3rd in the 1955 Pan American Games 4×100 metre medley (with Walter Ocampo, Eulalio Ríos, and Otilio Olguín).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1948 Summer Olympics | Swimming (Aquatics) |  MEX | 
Clemente Mejía | |||
| 4 × 200 metres Freestyle Relay, Men (Olympic) | Mexico | |||||
| 100 metres Backstroke, Men (Olympic) | =4 | |||||
| 1952 Summer Olympics | Swimming (Aquatics) |  MEX | 
Clemente Mejía | |||
| 100 metres Backstroke, Men (Olympic) | =23 |