Ivan "Ironman" Stewart (born June 4, 1945) is an American former professional off road racing driver.

After some additional conquests, he joined the Toyota factory team in 1983 for Cal Wells at Precision Preparation Inc.

He is the only person so far to win overall including motorcycles while driving a four-wheel vehicle solo in the Baja 1000.

These trucks featured a special Ivan Stewart signature package with Toyota Racing Development (TRD) wheels, grille, interior, and supercharger.

He wrote a book, Ivan "Ironman" Stewart's Ultimate Off-Road Adventure Guide (Motorbooks, 2007).