Jean-Marie Hullot (born February 16, 1954) is a French computer scientist and programmer who authored important programs for the original Macintosh, NeXTSTEP and Mac OS X platforms. These include the SOS Interface for the Mac, which later became Interface Builder for NeXTSTEP (1985), and later still evolved into an important part of Mac OS X. He also led the iCal and iSync development teams for Mac OS X (2002).

In 1981, Jean-Marie Hullot received a Ph.D. in computer science from the University of Paris at Orsay, where his adviser was Gérard Huet. He was a researcher at INRIA from 1979 to 1985, when he joined NeXT. In 1996 he co-founded RealNames, a URL translation service which closed in 2002. He worked as CTO of Application Division at Apple Inc. from 2001 to 2005. Currently, he is the President and CEO of Fotopedia, a collaborative photo encyclopaedia.