Iwan Iwanoff (Bulgarian: ???? ??????) (2 July 1919 – 7 October 1986) also known as Iwan Nickolow (Bulgarian: ???? ???????) and Iwan Nickoloff Iwanoff (Bulgarian: ???? ??????? ??????), born in Kyustendil, Bulgaria and died in Perth, Western Australia, was an architect known for working in the Brutalist style.
Iwan Iwanoff studied architecture in Europe before arriving in Perth to work as an architect.
He became renowned for his design characteristic which is mainly working with concrete blocks.