Simon Dallas Cairns, 6th Earl Cairns, CVO, CBE (born 27 May 1939), styled Viscount Garmoyle between 1946 and 1989, is a British businessman.

Cairns is the son of Rear-Admiral David Cairns, 5th Earl Cairns, and Barbara Jeanne Harrison Burgess.^[1] He was educated at Ludgrove, Eton and Trinity College, Cambridge.^[2][3]

Cairns was Managing Director of S. G. Warburg & Co. between 1979 and 1985, of Mercury Securities plc between 1981 and 1984, Chairman of Voluntary Service Overseas (VSO) between 1981 and 1992, Vice-Chairman of Mercury Securities plc between 1984 and 1986, and a Director of S. G. Warburg & Co. between 1985 and 1995.^[3] He succeeded his father in the earldom on 21 March 1989.^[4] He was Receiver-General of the Duchy of Cornwall between 1990 and 2000.^[3] He was Chief Executive of S. G. Warburg & Co. between 1991 and 1995. He was Chairman of CDC Group plc from 1995.^[3]

He was chairman of BAT plc between 1995 and 1998, and was Vice-Chairman of Zurich Allied AG and Zurich Financial Services between 1998 and 2000. He was Chairman of Allied Zurich between 1998 and 2000.^[3]

He was appointed Chairman of the African telecommunications company Celtel in October 2007 and was a board member of the charity The Mo Ibrahim Foundation until 2016, alongside Mary Robinson and Kofi Annan.^[5]

He was invested as a Commander, Order of the British Empire (CBE), in 1992. Cairns was invested as a Commander of the Royal Victorian Order (C.V.O.) in 2000.^[3]

Lord Cairns married Amanda Mary Heathcoat-Amory, daughter of Maj. Edward Fitzgerald Heathcoat-Amory (a son of Maj. Ludovic Heathcoat-Amory) and Sonia Myrtle Denison, on 4 February 1964.^[3] They have three sons:

• Hugh Sebastian Frederick Cairns, Viscount Garmoyle (born 26 March 1965).
• Hon. David Patrick Cairns (born 27 May 1967).
• Hon. Alistair Benedict Cairns (born 16 May 1969).

• Hansard 1803–2005: contributions in Parliament by the Earl Cairns

v t e Current earls in the peerages of Britain and Ireland
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England	Charles Chetwynd-Talbot, 22nd Earl of Shrewsbury Edward Stanley, 19th Earl of Derby William Hastings-Bass, 17th Earl of Huntingdon William Herbert, 18th Earl of Pembroke Charles Courtenay, 19th Earl of Devon Robert Fiennes-Clinton, 19th Earl of Lincoln Alexander Howard, 22nd Earl of Suffolk William Herbert, 15th Earl of Montgomery Alexander Feilding, 12th Earl of Denbigh Anthony Fane, 16th Earl of Westmorland Alexander Howard, 15th Earl of Berkshire Richard Bertie, 14th Earl of Lindsey Daniel Finch-Hatton, 17th Earl of Winchilsea John Montagu, 11th Earl of Sandwich Paul Capell, 11th Earl of Essex George Howard, 13th Earl of Carlisle Nicholas Ashley-Cooper, 12th Earl of Shaftesbury Daniel Finch-Hatton, 12th Earl of Nottingham Richard Bertie, 9th Earl of Abingdon Timothy Bentinck, 12th Earl of Portland Richard Lumley, 13th Earl of Scarbrough Rufus Keppel, 10th Earl of Albemarle George Coventry, 13th Earl of Coventry William Child Villiers, 10th Earl of Jersey
Scotland	Alistair Sutherland, 25th Earl of Sutherland Anthony Lindsay, 30th Earl of Crawford Margaret of Mar, 31st Countess of Mar Merlin Hay, 24th Earl of Erroll Malcolm Sinclair, 20th Earl of Caithness Stewart Douglas, 22nd Earl of Morton James Leslie, 22nd Earl of Rothes Henry Erskine, 18th Earl of Buchan Hugh Montgomerie, 19th Earl of Eglinton John Stuart, 21st Earl of Moray James Erskine, 14th Earl of Mar Michael Douglas-Home, 16th Earl of Home James David Drummond, 10th Earl of Perth Simon Bowes-Lyon, 19th Earl of Strathmore and Kinghorne James Erskine, 16th Earl of Kellie George Baillie-Hamilton, 14th Earl of Haddington Andrew Stewart, 14th Earl of Galloway Ian Maitland, 18th Earl of Lauderdale James Lindesay-Bethune, 16th Earl of Lindsay Simon Abney-Hastings, 15th Earl of Loudoun Charles Hay, 16th Earl of Kinnoull Andrew Bruce, 11th Earl of Elgin James Charteris, 13th Earl of Wemyss James Ramsay, 17th Earl of Dalhousie David Ogilvy, 14th Earl of Airlie Alexander Leslie-Melville, 15th Earl of Leven John Grant, 13th Earl of Dysart John Douglas-Hamilton, 12th Earl of Selkirk Patrick Carnegy, 15th Earl of Northesk Andrew Bruce, 15th Earl of Kincardine Anthony Lindsay, 13th Earl of Balcarres Filippo Rospigliosi, 12th Earl of Newburgh Alexander Scrymgeour, 12th Earl of Dundee Patrick Hope-Johnstone, 11th Earl of Annandale and Hartfell Iain Cochrane, 15th Earl of Dundonald James Keith, 14th Earl of Kintore Malcolm Murray, 12th Earl of Dunmore Alexander Leslie-Melville, 14th Earl of Melville Peter St John, 9th Earl of Orkney James Charteris, 9th Earl of March Ian Ogilvie-Grant, 13th Earl of Seafield John Dalrymple, 14th Earl of Stair Harry Primrose, 8th Earl of Rosebery Patrick Boyle, 10th Earl of Glasgow
Great Britain	Robert Shirley, 14th Earl Ferrers William Legge, 10th Earl of Dartmouth Peter Bennett, 10th Earl of Tankerville Charles Finch-Knightley, 12th Earl of Aylesford Richard Parker, 9th Earl of Macclesfield James Waldegrave, 13th Earl Waldegrave Charles Stanhope, 12th Earl of Harrington Quentin Wallop, 10th Earl of Portsmouth Guy Greville, 9th Earl Brooke George Hobart-Hampden, 10th Earl of Buckinghamshire Piers North, 10th Earl of Guilford Joseph Yorke, 10th Earl of Hardwicke Robin Fox-Strangways, 10th Earl of Ilchester Guy Greville, 9th Earl of Warwick William Sackville, 11th Earl De La Warr William Pleydell-Bouverie, 9th Earl of Radnor Charles Spencer, 9th Earl Spencer Allen Bathurst, 9th Earl Bathurst George Villiers, 8th Earl of Clarendon Alexander Murray, 8th and 9th Earl of Mansfield Charles Chetwynd-Talbot, 7th Earl Talbot Christopher Edgcumbe, 9th Earl of Mount Edgcumbe Charles Fortescue, 8th Earl Fortescue Alexander Murray, 9th Earl of Mansfield George Herbert, 8th Earl of Carnarvon Edward Cadogan, 9th Earl Cadogan James Harris, 7th Earl of Malmesbury
Ireland	Kingdom of Ireland Charles Chetwynd-Talbot, 22nd Earl of Waterford John Boyle, 15th Earl of Cork William Anthony Nugent, 13th Earl of Westmeath John Brabazon, 15th Earl of Meath Alexander Feilding, 11th Earl of Desmond Roger Lambart, 13th Earl of Cavan John Boyle, 15th Earl of Orrery Derry Moore, 12th Earl of Drogheda Peter Forbes, 10th Earl of Granard Ivo Bligh, 12th Earl of Darnley Myles Ponsonby, 12th Earl of Bessborough Thomas Butler, 11th Earl of Carrick Henry Boyle, 10th Earl of Shannon Arthur Gore, 9th Earl of Arran Patrick Stopford, 9th Earl of Courtown John Savile, 8th Earl of Mexborough David Turnour, 8th Earl Winterton Robert King-Tenison, 12th Earl of Kingston Robert Jocelyn, 10th Earl of Roden David Vaughan, 9th Earl of Lisburne Patrick Meade, 8th Earl of Clanwilliam Randal McDonnell, 10th Earl of Antrim Thomas Pakenham, 8th Earl of Longford George Dawson-Damer, 7th Earl of Portarlington Charles Bourke, 11th Earl of Mayo Michael Annesley, 12th Earl Annesley Andrew Cole, 7th Earl of Enniskillen John Crichton, 7th Earl Erne George Bingham, 8th Earl of Lucan John Lowry-Corry, 8th Earl Belmore Andrew Stuart, 9th Earl Castle Stewart Nicholas Alexander, 7th Earl of Caledon Richard Hely-Hutchinson, 8th Earl of Donoughmore After 1801 Edmund Pery, 7th Earl of Limerick Nicholas Trench, 9th Earl of Clancarty Brendan Parsons, 7th Earl of Rosse Charles Acheson, 7th Earl of Gosford Shaun Agar, 6th Earl of Normanton Richard Needham, 6th Earl of Kilmorey Francis Hare, 6th Earl of Listowel Richard Graham-Toler, 7th Earl of Norbury Edward Knox, 8th Earl of Ranfurly
United Kingdom	King George III Peter St Clair-Erskine, 7th Earl of Rosslyn Benjamin Craven, 9th Earl of Craven Rupert Onslow, 8th Earl of Onslow Julian Marsham, 8th Earl of Romney John Pelham, 9th Earl of Chichester Francis Grosvenor, 8th Earl of Wilton John Herbert, 8th Earl of Powis Simon Nelson, 10th Earl Nelson Philip Kent Grey, 7th Earl Grey William Lowther, 9th Earl of Lonsdale Conroy Ryder, 8th Earl of Harrowby Prince Regent David Lascelles, 8th Earl of Harewood Timothy Elliot-Murray-Kynynmound, 7th Earl of Minto Charles Cathcart, 7th Earl Cathcart John Grimston, 7th Earl of Verulam Albert Eliot, 11th Earl of St Germans Mark Parker, 7th Earl of Morley Richard Bridgeman, 7th Earl of Bradford King George IV John Scott, 6th Earl of Eldon Frederick Curzon, 7th Earl Howe Keith Rous, 6th Earl of Stradbroke James Temple-Gore-Langton, 9th Earl Temple of Stowe Colin Campbell, 7th Earl Cawdor King William IV Thomas Anson, 6th Earl of Lichfield Edward Lambton, 7th Earl of Durham Fergus Leveson-Gower, 6th Earl Granville Edward Howard, 8th Earl of Effingham David Moreton, 7th Earl of Ducie Charles Pelham, 8th Earl of Yarborough Queen Victoria Thomas Coke, 8th Earl of Leicester Anthony Noel, 6th Earl of Gainsborough William Byng, 9th Earl of Strafford Mark Pepys, 9th Earl of Cottenham Graham Wellesley, 8th Earl Cowley David Ward, 5th Earl of Dudley Hugh Montgomerie, 7th Earl of Winton John Russell, 7th Earl Russell John Mackenzie, 5th Earl of Cromartie John Wodehouse, 5th Earl of Kimberley Richard Wortley, 5th Earl of Wharncliffe Simon Cairns, 6th Earl Cairns John Lytton, 5th Earl of Lytton William Palmer, 5th Earl of Selborne John Northcote, 5th Earl of Iddesleigh Gathorne Gathorne-Hardy, 5th Earl of Cranbrook King Edward VII Evelyn Baring, 4th Earl of Cromer Ivor Windsor-Clive, 4th Earl of Plymouth Edward Foljambe, 5th Earl of Liverpool King George V Harry Primrose, 4th Earl of Midlothian Michael Hicks Beach, 3rd Earl St Aldwyn David Beatty, 3rd Earl Beatty Alexander Haig, 3rd Earl Haig Edward Guinness, 4th Earl of Iveagh Roderick Balfour, 5th Earl of Balfour Raymond Asquith, 3rd Earl of Oxford and Asquith Patrick Jellicoe, 3rd Earl Jellicoe Peter Mackay, 4th Earl of Inchcape William Peel, 3rd Earl Peel King George VI Simon Bowes-Lyon, 6th Earl of Strathmore and Kinghorne Benedict Baldwin, 5th Earl Baldwin of Bewdley Peter Wood, 3rd Earl of Halifax Brer Ruthven, 3rd Earl of Gowrie David Lloyd George, 4th Earl Lloyd-George of Dwyfor Norton Knatchbull, 3rd Earl Mountbatten of Burma Queen Elizabeth II Shane Alexander, 2nd Earl Alexander of Tunis Mark Cunliffe-Lister, 4th Earl of Swinton John Attlee, 3rd Earl Attlee Simon Marquis, 3rd Earl of Woolton David Armstrong-Jones, 2nd Earl of Snowdon Alexander Macmillan, 2nd Earl of Stockton
Italics in entries mean the peer also holds a previously listed earldom of higher precedence