Sainthill, or St. Hill (anciently spelt 'de Sweynthill') is an English surname of Norman origin.

Notable people with this surname include:

Peter Sainthill (MP for Tiverton) (1593-1648), English politician known for his role in the English Civil War Sir Walter de Sweynthill (died circa 1340), English Knight who represented Devon in the Parliaments of Edward II and Edward III Peter Sainthill (died 1571), English politician Sir Peter Sainthill F.R.S. (1698- 1775), preeminent 18th century surgeon, who served as Master of the Company of Surgeons (1749-1750) Lieutenant-Colonel Windle St. Hill (1839-1918) Loudon Sainthill (1918-1969), Australian artist

Sainthill is also a given name:

Sir Sainthill Eardley-Wilmot K.C.I.E. (1825-1929), British Civil Servant and Conservationist who served as Inspector-General of Forests

See also

Bradninch Manor, the family seat of the Sainthill (also spelt St. Hill) family from 1553