Leendert is a Dutch given name. Notable people with this name include:
Leendert van Beijeren (1619–1649), Dutch painterLeendert Bosch (1924–2017), Dutch biochemistLeen Buis (1906–1986), Dutch road cyclist, given name LeendertLeendert van der Cooghen (1632–1681), Dutch painterLeendert van Dis (born 1944), Dutch rowerLeendert Antonie Donker (1899–1956), Dutch politicianLeendert Ginjaar (1928–2003), Dutch politicianLeendert Hasenbosch (c. 1695–c.1725), Dutch castawayLeendert Konijn (1899–1977), Dutch entrepreneur in Dutch East IndiesLeendert de Koningh (1777–1849), Dutch painterLeendert de Lange (born 1972), Dutch politicianLeendert van der Meulen (born 1937), Dutch cyclistLeendert Pieter de Neufville (1729–1797), Dutch bankerLeendert Saarloos (1884–1969), Dutch dog breederLeendert Viervant the Younger (1752–1801), Dutch architect and cabinet builderLeendert van der Vlugt (1894–1936), Dutch architect