| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | João Alberto•Martins da Naia Lemos | |
| Used name | João Alberto•Lemos | |
| Born | 21 January 1928 in Vera Cruz, Aveiro, Distrito de Aveiro |  POR |
| Died | 7 October 1984 (aged 56 years 8 months 17 days) in Glória, Aveiro, Distrito de Aveiro | POR |
| Measurements | 178 cm | |
| Affiliations | Clube dos Galitos — Aveiro, Distrito de Aveiro | POR |
| NOC | Portugal | POR |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1948 Summer Olympics | Rowing | POR |
João Alberto Lemos | |||
| Eights, Men (Olympic) | Portugal | 2 h3 r3/4 | ||||
| 1952 Summer Olympics | Rowing | POR |
João Alberto Lemos | |||
| Eights, Men (Olympic) | Portugal | 3 h1 r2/5 |
