William Parsons may refer to:

• William Parsons (surveyor) (1701–1757), Surveyor General, founder of Easton, Pennsylvania
• Sir William Parsons, 4th Baronet (1731-1791)
• William Parsons (poet) (1764 ca.-1828), English writer associated with the Della Cruscan movement
• William Parsons (musician) (1786–1817), Master of the King's Music
• William Parsons, 3rd Earl of Rosse (1800–1867), Lord Rosse, Irish astronomer
• William Barclay Parsons (1859–1932), American civil engineer
• William Sterling Parsons (1901–1953), "Deak" Parsons, atomic bomb weaponeer on the Enola Gay, rose to Rear Admiral
• William W. Parsons, former director of the NASA John F. Kennedy Space Center, and former NASA Space Shuttle Program manager.
• William Parsons (scientist), physicist at the University of Maryland, College Park
• William Parsons (actor)

This disambiguation page lists articles associated with the same personal name. If an article link led you here, you may wish to change the link to point directly to the intended article.