|Intro||Dutch road cyclist|
|Was||Athlete Sport cyclist|
|Birth||5 December 1906, Zwanenburg, Netherlands|
|Death||17 November 1986, Amsterdam, Netherlands (aged 80 years)|
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.