Lucy Knightley (1742–1791) was a British politician who sat in the House of Commons between 1763 and 1784.
Knightley was the son of Valentine Knightley of Fawsley, Northamptonshire and his wife Elizabeth Dummer, daughter of Edward Dummer of Swaythling, Hampshire and was born on 23 February 1742.
In 1760, he matriculated at Brasenose College, Oxford on 26 January aged 17.
[1] On the death of his father on 2 May 1754, he had succeeded to Fawsley Hall,[2] which he developed in the 1760s by employing Capability Brown on his gardens.
[2] Knightley was returned for Member of Parliament for Northampton at a by-election on 21 November 1763 on the Compton interest.