William Montagu
William Montagu is the name of the following people:
- William Montagu, 2nd Baron Montagu (around 1285–1319), English nobleman, military man, civil servant and courtier
- William Montagu, 1st Earl of Salisbury (1301–1344), English nobleman
- William Montagu, 2nd Earl of Salisbury (1328–1397), English nobleman and commander
See also: