William Edgar Fulton (born August 29, 1939) is an American mathematician, specializing in algebraic geometry.

His Ph.D. thesis, written under the supervision of Gerard Washnitzer, was on The fundamental group of an algebraic curve.

[2] As of 2024, Fulton had supervised the doctoral work of 24 students at Brown, Chicago, and Michigan.

Fulton is known as the author or coauthor of a number of popular texts, including Algebraic Curves and Representation Theory.

In 1996 he received the Steele Prize for mathematical exposition for his text Intersection Theory.