This is a list of Viscounts in the Peerages of England, Scotland, Great Britain, Ireland, and the United Kingdom. The general order of precedence among Viscounts is:
- Viscounts of England
- Viscounts of Scotland
- Viscounts of Great Britain
- Viscounts of Ireland created before 1801
- Viscounts of the United Kingdom and of Ireland created after 1801
Viscounts of England
- The Viscount Hereford
Viscounts of Scotland
- The Viscount Falkland
- The Viscount of Arbuthnott
- The Viscount of Oxfuird
Viscounts of Great Britain
- The Viscount Bolingbroke and St John
- The Viscount Cobham
- The Viscount Falmouth
- The Viscount Torrington
- The Viscount Hood
Viscounts of Ireland prior to 1801
- The Viscount Gormanston
- The Viscount Mountgarret
- The Viscount of Valentia
- The Viscount Dillon
- The Viscount Massereene and Ferrard
- The Viscount Charlemont
- The Viscount Downe
- The Viscount Molesworth
- The Viscount Chetwynd
- The Viscount Midleton
- The Viscount Boyne
- The Viscount Gage
- The Viscount Galway
- The Viscount Powerscourt
- The Viscount Ashbrook
- The Viscount Southwell
- The Viscount de Vesci
- The Viscount Lifford
- The Viscount Bangor
- The Viscount Doneraile
- The Viscount Harberton
- The Viscount Hawarden
- The Viscount Monck
Viscounts of the United Kingdom and of Ireland after 1801
- The Viscount St Vincent
- The Viscount Melville
- The Viscount Sidmouth
- The Viscount Gort
- The Viscount Exmouth
- The Viscount Combermere
- The Viscount Hill
- The Viscount Hardinge
- The Viscount Gough
- The Viscount Bridport
- The Viscount Portman
- The Viscount Hampden
- The Viscount Cross
- The Viscount Hambleden
- The Viscount Knutsford
- The Viscount Esher
- The Viscount Goschen
- The Viscount Ridley
- The Viscount Colville of Culross
- The Viscount Churchill
- The Viscount Selby
- The Viscount Knollys
- The Viscount Allendale
- The Viscount Chilston
- The Viscount Scarsdale
- The Viscount Mersey
- The Viscount Cowdray
- The Viscount Devonport
- The Viscount Astor
- The Viscount Wimborne
- The Viscount Saint Davids
- The Viscount Rothermere
- The Viscount Allenby of Megiddo
- The Viscount Chelmsford
- The Viscount Long
- The Viscount Ullswater
- The Viscount Leverhulme
- The Viscount Younger of Leckie
- The Viscount Bearsted
- The Viscount Craigavon
- The Viscount Bridgeman
- The Viscount Hailsham
- The Viscount Brentford
- The Viscount Buckmaster
- The Viscount Bledisloe
- The Viscount Hanworth
- The Viscount Trenchard
- The Viscount Greenwood
- The Viscount Samuel
- The Viscount Runciman of Doxford
- The Viscount Davidson
- The Viscount Weir
- The Viscount Caldecote
- The Viscount Simon
- The Viscount Camrose
- The Viscount Stansgate (presently disclaimed by the Rt. Hon. Tony Benn)
- The Viscount Margesson
- The Viscount Daventry
- The Viscount Addison
- The Viscount Lambert
- The Viscount Kemsley
- The Viscount Marchwood
- The Viscount Alanbrooke
- The Viscount Montgomery of Alamein
- The Viscount Waverley
- The Viscount Thurso
- The Viscount Brookeborough
- The Viscount Norwich
- The Viscount Leathers
- The Viscount Soulbury
- The Viscount Chandos
- The Viscount Malvern
- The Viscount de L'Isle
- The Viscount Ingleby
- The Viscount Monkton of Brenchley
- The Viscount Tenby
- The Viscount Mackintosh of Halifax
- The Viscount Dunrossil
- The Viscount Stuart of Findhorn
- The Viscount Rochdale
- The Viscount Slim
- The Viscount Head
- The Viscount Boyd of Merton
- The Viscount Mills
- The Viscount Blakenham
- The Viscount Eccles
- The Viscount Dilhorne