| Juan Lavenás | |
| Nationality: | Argentine |
| Sport: | Sprinting |
| Event: | 4 × 100 metres relay |
| Birth Date: | 5 September 1914 |
Juan Lavenás (5 September 1914 - 19 April 1999) was an Argentine sprinter. He competed in the men's 4 × 100 metres relay at the 1936 Summer Olympics.[1]