William à Court, 1st Baron Heytesbury, known as Sir William à Court, 2nd Baronet, from 1817 to 1828, was an English diplomat and Conservative politician.
Heytesbury is a village and a civil parish in Wiltshire, England. The village lies on the north bank of the Wylye, about 3+1⁄2 miles southeast of the town of Warminster.