Donald Michael Marolf is a theoretical physicist, a professor of physics, and former head of the physics department at the University of California, Santa Barbara.

Marolf gained his Ph.D. from University of Texas at Austin in 1992, under Bryce DeWitt with a thesis on Green's Bracket Algebras and Their Quantization.^[1] His undergraduate-degree is from William Jewell College, in 1987.

He is an expert on thermodynamics of black holes, gravitational aspects in string theory, classical- and quantum-gravity. In the past he has worked on the canonical approach to quantum-gravity, lower-dimensional models of quantum-gravity, issues related to quantization of diffeomorphism-invariant theories, and a number of other topics. He has published 113 scientific papers through 2007.

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