Viscount Lanesborough is a title that has been created twice in the Peerage of Ireland.
The first creation came on 31 July 1676 in favour Sir George Lane, 2nd Baronet.
The titles became extinct upon the death of his son, the second Viscount, on 2 August 1724.
The second creation came on 12 August 1728 in favour of Brinsley Butler, 2nd Baron Newtown-Butler.
The Honourable Frances Lane, daughter of the first Viscount of the first creation, married as her second husband Henry Fox.