Leen Buis
| Intro | Dutch road cyclist |
| A.K.A. | Leendert Buis |
| Was | Athlete Sport cyclist |
| From | Netherlands |
| Type | Sports |
| Gender | male |
| Birth | 5 December 1906, Zwanenburg, Netherlands |
| Death | 17 November 1986, Amsterdam, Netherlands (aged 80 years) |
| Star sign | Sagittarius |
Leendert "Leen" Buis (5 December 1906 – 17 November 1986) was a Dutch road cyclist. He competed at the 1928 Summer Olympics and finished 17th individually and 9th in the team competition.