William Kirby may refer to:
- William Kirby (entomologist) (1759–1850), English entomologist
- William Kirby (author) (1817–1906), Canadian author
- William Kirby (producer), filmmaker
- William C. Kirby, T. M. Chang Professor of China Studies and Spangler Family Professor of Business Administration at Harvard University
- William F. Kirby (1867–1934), American politician
- William Forsell Kirby (1844–1912), English entomologist & folklorist
- William T. Kirby (1911–1990), businessman
- William Kirby (footballer), Gaelic footballer
- William Kirby (cricketer) (born 1981), English cricketer
- Will Kirby (born 1973), American Big Brother contestant
- Bill Kirby (born 1975), Australian swimmer
- Cam Kirby (William J. Cameron Kirby, 1909–2003), Canadian politician
Famous quotes containing the word kirby:
“Well, on the official record you’re my son. But on this post you’re just another trooper. You heard me tell the recruits what I need from them. Twice that I will expect from you.... You’ve chosen my way of life. I hope you have the guts enough to endure it. But put outa your mind any romantic ideas that it’s a way to glory. It’s a life of suffering and of hardship and uncompromising devotion to your oath and your duty.”
—James Kevin McGuinness, and John Ford. Lt. Col. Kirby Yorke (John Wayne)