Baron Swaythling, of Swaythling in the County of Southampton, is a title in the Peerage of the United Kingdom.^[1] It was created in 1907 for the British Jewish Liberal politician, banker and philanthropist, Sir Samuel Montagu, 1st Baronet. He had already been created a Baronet, of South Stoneham House in the County of Southampton and of Kensington Palace Gardens in the County of London, in 1894.^[2] As of 2010^[update], the titles are held by his great-great-grandson, the fifth Baron, who succeeded his father in 1998.

Several other members of the family may also be mentioned. The Hon. Edwin Montagu, second son of the first Baron, was a Liberal politician and the husband of Venetia Stanley. The medical researcher Philip D'Arcy Hart was the grandson of the first Baron. The Hon. Ewen Montagu, second son of the second Baron, was a judge, writer and intelligence officer, famous for conceptualizing Operation Mincemeat. The Hon. Ivor Montagu, third son of the second Baron, was a film maker. Also, the first Baron was the uncle of the Liberal Member of Parliament Sir Stuart Samuel, 1st Baronet Samuel, and of Liberal politician Herbert Samuel, 1st Viscount Samuel.

• Samuel Montagu, 1st Baron Swaythling (1832–1911)
• Louis Samuel Montagu, 2nd Baron Swaythling (1869–1927) m. Gladys, Baroness Swaythling.
• Stuart Albert Montagu, 3rd Baron Swaythling (1898–1990)
• David Charles Samuel Montagu, 4th Baron Swaythling (1928–1998)
• Charles Edgar Samuel Montagu, 5th Baron Swaythling (born 1954)

The heir presumptive is the present holder's first cousin, Rupert Anthony Samuel Montagu (born 1965),^[3] grandson of the 3rd Baron through his younger son, the Hon. Anthony Trevor Samuel Montagu (1931–2010).^{[citation needed]}
The heir presumptive's heir apparent is his eldest son, Henry George Samuel Montagu (born 2008).

• Viscount Samuel
• Samuel baronets
• Swaythling

• Kidd, Charles; Williamson, David, eds. (2003). Debrett's Peerage and Baronetage. London: Macmillan. pp. P1551–P1552. ISBN 978-0-3336-6093-5.

v t e Extant hereditary baronies in the Peerage of the United Kingdom
King George III	Ellenborough Manners
The Prince Regent	Churchill Harris
King George IV	Ravensworth Delamere Forester Rayleigh Gifford Feversham Seaford Plunket Heytesbury Skelmersdale Wynford
King William IV	Kilmarnock Poltimore Mostyn de Saumarez Denman Abinger Ashburton Hatherton Stratheden Lovat^*
Queen Victoria	Rossmore^• Carew^• de Mauley Wrottesley Sudeley Methuen Stanley of Alderley^• Leigh Monteagle of Brandon Campbell Vivian Congleton Eddisbury^• Londesborough de Freyne Raglan Belper Chesham Churston Leconfield Lyveden Brougham and Vaux Westbury Annaly Northbrook Hartismere^• Hylton Penrhyn O'Neill Napier of Magdala Dunning^* Acton Wolverton O'Hagan Sandhurst Ettrick^* Aberdare Moncreiff Coleridge Cottesloe Hampton Harlech Tollemache Gerard Sackville Norton Trevor Ampthill Derwent Hothfield Tennyson Strathspey Monk Bretton Northbourne Northington^• Rothschild Revelstoke Monkswell Ashbourne St Oswald Montagu of Beaulieu Elphinstone^* Hindlip Grimthorpe Kensington^• Hamilton of Dalzell St Levan Basing de Ramsey Addington Savile Ashcombe Crawshaw Amherst of Hackney Newton Dunleath Swansea Aldenham HolmPatrick Burton Glanusk Cranworth Avebury Killanin Strathcona and Mount Royal
King Edward VII	Kinross Shuttleworth Grenfell Redesdale Burnham Biddulph Ritchie of Dundee Hemphill Joicey Nunburnholme Swaythling Blyth Marchamley Gorell Fisher Kilbracken
King George V	Hardinge of Penshurst de Villiers Glenconner Aberconway Merthyr Rowallan Ashton of Hyde Ravensdale Hollenden Parmoor Cunliffe Wrenbury Faringdon Shaughnessy Rathcreedan Somerleyton Carnock Beaverbrook Gainford Forteviot Colwyn Gisborough Morris Cawley Terrington Glenarthur Phillimore Inverforth Sinha Cochrane of Cults Clwyd Russell of Liverpool Swinfen Meston Cullen of Ashbourne Trevethin Glendyne Manton Forres Vestey Borwick Maclay Bethell Hunsdon Darling Banbury of Southam Merrivale Bradbury Mereworth^• Greenway Hayter Cornwallis Daresbury Wraxall Remnant Moynihan Craigmyle Dulverton Luke Alvingham Baden-Powell Ponsonby of Shulbrede Dickinson Noel-Buxton Howard of Penrith Rochester Selsdon Moyne Davies Rankeillour Brocket Milne Rennell Mottistone Iliffe Palmer Rockley Elton Wakehurst Hesketh Tweedsmuir Wigram Riverdale May Kennet Strathcarron
King Edward VIII	Catto
King George VI	Windlesham Mancroft McGowan Denham Rea Cadman Kenilworth Pender Roborough Brassey of Apethorpe Stamp Bicester Milford Hankey Harmsworth Rotherwick Glentoran Tryon Croft Teviot Nathan Reith Kindersley Ironside Latham Wedgwood Geddes Bruntisfield Brabazon of Tara Keyes Hemingford Moran Killearn Dowding Gretton Westwood Hazlerigg Hacking Chetwode Sandford Altrincham Broadbridge Mountevans Lindsay of Birker Piercy Chorley Calverley Tedder Colgrain Darwen Lucas of Chilworth Shepherd Newall Oaksey Rugby Layton Simon of Wythenshawe Kershaw Trefgarne Crook Amwell Milverton Clydesmuir Burden Haden-Guest Silkin§ Hives Ogmore Morris of Kenwood Macpherson of Drumochter Kenswood Freyberg Milner of Leeds Kirkwood Wise
Queen Elizabeth II	Jeffreys Rathcavan Baillieu Grantchester Coleraine Harvey of Tasburgh Gridley Strathalmond Strathclyde Clitheroe McNair Colyton Astor of Hever Sinclair of Cleeve Bridges Norrie Birkett Harding of Petherton Poole Rootes Netherthorpe Crathorne Spens MacAndrew Nelson of Stafford Howick of Glendale Sanderson of Ayot Cobbold Robertson of Oakridge Marks of Broughton Fairhaven Leighton of St Mellons Brain Aldington Inchyra Silsoe Egremont Thomson of Fleet Martonmere Sherfield Inglewood Glendevon Grimston of Westbury Renwick St Helens Margadale
§: Disclaimed.  Italics: This title is held by a peer who holds another of higher precedence. ^* Also a Lord in the Peerage of Scotland  ^• Also a Baron in the Peerage of Ireland