William Parsons
William Parsons may refer to:
Arts and entertainment
- William Parsons (composer and copyist), English Renaissance composer and copyist from Wells
- William Parsons (composer and musician), Master of the King's Music
- William Parsons (poet), English writer associated with the Della Cruscan movement
- William Parsons (actor), British actor and painter
- William Parsons (silent film actor), American silent comedy film actor often credited as "Smiling Bill Parsons"
Sports
- William Parsons (footballer), Anglo-Spanish footballer
- Bill Parsons, baseball player
Nobleman
- Sir William Parsons, 1st Baronet of Langley, of the Parsons baronets
- Sir William Parsons, 1st Baronet of Bellamont, Surveyor General of Ireland and Member of Parliament
- Sir William Parsons, 2nd Baronet of Bellamont, Earl of Rosse
- Sir William Parsons, 2nd Baronet of Birr Castle, Earl of Rosse
- Sir William Parsons, 4th Baronet of Birr Castle, Irish politician
- William Parsons, 3rd Earl of Rosse, Lord Rosse, Irish astronomer
- William Parsons, 5th Earl of Rosse, Irish peer and British Army officer
- William Parsons, 7th Earl of Rosse, worked for the United Nations
Others
- William Parsons (surveyor), Surveyor General, founder of Easton, Pennsylvania
- William Barclay Parsons, American civil engineer
- William E. Parsons, American architect and city planner
- William Sterling Parsons, American naval officer and atomic bomb weaponeer aboard Enola Gay
- William W. Parsons (academic administrator), president of Indiana State Normal School, later known as Ball State University
- William W. Parsons (NASA), former director of the NASA John F. Kennedy Space Center, & Space Shuttle Program manager
- William Henry Parsons (New York activist), headed the New York Society for the Suppression of Vice
- William Henry Parsons (colonel), American newspaper editor, legislator, and Confederate colonel