Earl of Aylesford, in the County of Kent, is a title in the Peerage of Great Britain.

Lord Aylesford's eldest son, the second Earl, represented Maidstone and Surrey in Parliament.

His eldest son, the fourth Earl, represented Castle Rising and Maidstone in the House of Commons, and after entering the House of Lords on his father's death, served as Captain of the Yeomen of the Guard from 1783 to 1804 and as Lord Steward of the Household from 1804 to 1812.

His grandson, the tenth Earl, assumed by Royal licence his grandmother's maiden surname of Knightley in addition to that of Finch.

Styled as Lord Guernsey from 1958, he was educated at Oundle School and Trinity College, Cambridge.