Ivan Vasilyov (Bulgarian: Иван Васильов) was a Bulgarian architect, born in 1893, deceased in 1979.

Together with Dimitar Tsolov, they established one of the most successful Bulgarian architectural studios called Vasilyov-Tsolov. Many of the landmarks of Sofia are their works,^[1] most notably SS. Cyril and Methodius National Library (1940-1953), St Nedelya Church, Sofia (1929), Sofia University Library (1932), Bulgarian National Bank headquarters (1939) and The Ministry of Defence headquarters (1939-1945).

In 2010, in their honor, a commemorative plaque was affixed to the National Library.^[1]

Born as Ivan Tsokov Vasilyov on 28 February 1893 in the town of Oryahovo, Bulgaria. In 1911, after completing high school in Sofia, he went to Munich to study painting. In 1914, Vasilyov started his education in architecture in the Karlsruhe Institute of Technology where he graduated in 1919. After returning to Bulgaria, he worked in collaboration with Stancho Belkovski on the design of Vlado Georgiev house, nowadays the Austrian Embassy. In 1925, Ivan Vasilyov started a long time cooperation with Dimitar Tsolov with whom he created one of the finest examples in the Bulgarian architecture of that era.

• List of Bulgarian architects