Sir Humphrey Cornewall, baptised 16 July 1616, buried 7 July 1688, was an English landowner from Herefordshire and Member of Parliament for Leominster from 1661 to 1679. He served in the Royalist army during the First English Civil War, although he later claimed to have done so under compulsion. After the Stuart Restoration, he was appointed Deputy lieutenant of Herefordshire in 1662, and became Mayor of Ludlow in 1686.

Leominster was a parliamentary constituency represented until 1707 in the House of Commons of England, then until 1801 in that of Great Britain, and finally until 2010, when it disappeared in boundary changes, in the Parliament of the United Kingdom.