Leonardus van der Laan (20 April 1864 – 17 March 1942) was a Dutch architect.
Leo van der Laan was born in The Hague.
Van der Laan worked as an independent architect from 1891 in Leiden.
From 1921 he worked in partnership with his son Jan after the latter had completed his training at the Technische Hogeschool in Delft.
The two of them were responsible for the design of about 400 buildings in Leiden and the surrounding area.