William Harper
William, Will, Willie, Bill, or Billy Harper may refer to:
Arts and entertainment
- William A. Harper, Canadian-born artist
- Billy Harper, American jazz saxophonist
- William Claude Harper, American jewelry artist
- William Harper , American composer and photographer
- William Jackson Harper, American actor
Law and politics
- William Harper , US Senator from South Carolina
- William Harper , American politician in Louisiana
- William Harper , Royal Air Force pilot and Rhodesian politician
Sports
Association football (soccer)
- Billy Harper , English footballer
- Bill Harper , Scottish football goalkeeper
- Billy Harper , English footballer
- Bill Harper , Scottish football goalkeeper
Other sports
- Bill Harper , American baseball pitcher
- Bill Harper , Canadian soccer player
- Willie Harper, American football linebacker
Others
- William Rainey Harper, American academic, first president of the University of Chicago
- William Edmund Harper, Canadian astronomer
- William Harper Jr., American pioneer aviator with the Wright brothers