William Herbert
William Herbert may refer to:
Earls of Pembroke
- William Herbert, 1st [Earl of Pembroke (died 1469)]
- William Herbert, 2nd [Earl of Pembroke]
- William Herbert, 1st Earl of Pembroke (died 1570), Tudor period noble and courtier
- William Herbert, 3rd Earl of Pembroke
- William Herbert, [6th Earl of Pembroke], English nobleman and politician
- William Herbert, 18th Earl of Pembroke
Other peers
- William Herbert, 1st Baron Powis, an English peer and landowner
- William Herbert, 1st Marquess of Powis, an English peer and landowner
- William Herbert, 2nd Marquess of Powis, an English and later British peer and landowner
- William Herbert, 3rd Marquess of Powis, a British peer and landowner
Others
- William Herbert (MP fl.1555), MP for Monmouthshire 1555
- William Herbert (Captain), MP for Cardiff 1555
- Sir William Herbert (planter), Elizabethan planter in Ireland and MP for Monmouthshire 1584–1597
- William Herbert (died 1645), Welsh politician, MP for Cardiff 1621
- William Herbert (Royalist), Welsh politician, MP for Cardiff 1640
- William Herbert (died 1646), English politician, MP for Monmouthshire 1640
- William Herbert (of Coldbrook), Welsh politician, MP for Monmouthshire 1626
- William Herbert (British Army officer), general and Member of Parliament
- William Herbert (antiquarian), English librarian and antiquary
- William Herbert (bibliographer), editor of Typographical Antiquities by Joseph Ames
- William Herbert (botanist), British botanist, poet, and clergyman
- William Herbert Bradburn, Canadian politician
- William [Norman Herbert], British general