| Viscountcy Clifden | |
|---|---|
  Quarterly, 1st and 4th: Or, a cross sable charged with five crescents argent (for Ellis) 2nd and 3rd: Azure, a lion rampant or (for Agar) | |
| Creation date | 12 January 1781 |
| Created by | George III of Great Britain |
| Peerage | Peerage of Ireland |
| First holder | James Agar, 1st Baron Clifden |
| Last holder | Arthur Agar-Robartes, 8th Viscount Clifden |
| Remainder to | Heirs male of the first Viscount's body lawfully begotten |
| Subsidiary titles | Baron Clifden Baron Mendip Baron Robartes (1899–1974) |
| Extinction date | 22 December 1974 |
| Former seat(s) | Gowran Castle Holdenby House Dover House Lanhydrock House |
Viscount Clifden, of Gowran in the County of Kilkenny, Ireland, was a title in the Peerage of Ireland. It was created on 12 January 1781 for James Agar, 1st Baron Clifden. He had already been created Baron Clifden, of Gowran in the County of Kilkenny, in 1776, also in the Peerage of Ireland. The Viscounts also held the titles of Baron Mendip in the Peerage of Great Britain from 1802 to 1974 (a title which is still extant and now held by the Earl of Normanton) and Baron Dover from 1836 to 1899, when this title became extinct, and Baron Robartes from 1899 to 1974, when this title became extinct, the two latter titles which were in the Peerage of the United Kingdom. The interrelated histories of the peerages follow below.