| Birth Date: | 1 November 1933 |
| Birth Place: | Oud-Turnhout, Belgium |
| Sport: | Motor-paced racing |
| Show-Medals: | yes |
Leo Proost (1 November 1933 – 24 May 2016)[1] was a Belgian cyclist. His best achievements were in motor-paced racing, in which he won the world championships in the professionals category in 1963, 1967 and 1968, as well as national titles between 1963 and 1968. During his career Proost took part in 25 six-day races, winning the race of Antwerp in 1963.