William Whitcomb "Bill" Quillian (April 13, 1934 – July 12, 1973) was an American tennis player and coach.

[2][3] Quillian joined the University of Washington in Seattle as an undergrad in 1952.

Quillian played for the U.S. in the 1958 Davis Cup against Venezuela; at the quarterfinal of the Americas zone in Caracas in May, he won his doubles and singles match.

[4][5] Quillian was a coach from 1965,[6] until his death in 1973 at the age of 39 from leukemia.

[7][1] He was inducted into the University of Washington Hall of Fame in 1985.