William Winston Roper (August 22, 1880 – December 10, 1933) was an American football, basketball, and baseball player and coach.

Roper's Princeton Tigers football teams of 1906, 1911, 1920, and 1922 have been recognized as national champions, and his 89 wins are the most of any coach in the history of the program.

He attended the William Penn Charter School where he played football, basketball, and baseball, and continued all three sports in college at Princeton University.

[3] In 1912, United States President Woodrow Wilson appointed Roper as the appraiser of merchandise at the Port of Philadelphia.

As a politician, he worked successfully to repeal prohibition, though he himself was a teetotaller, and to change Pennsylvania's blue laws, which did not allow sports on Sundays.