Between 1999 and 2026, 92 hereditary peers were excepted from the House of Lords Act 1999 to sit in the House of Lords, the upper house of the Parliament of the United Kingdom. Of these, 90 were elected internally by the House, as well as the holders of two royal offices, the Earl Marshal and the Lord Great Chamberlain, who sat ex officio.

The initial cohort of excepted hereditary peers were elected in the 1999 House of Lords elections. Between 1999 and November 2002, vacancies among this group were filled by runners-up in the 1999 election. From 2002 to 2024, by-elections to the House of Lords filled vacancies. From 2024 to 2026, by-elections were paused and 11 vacancies went unfilled.

The electorates were either the whole membership of the House of Lords (including life peers), or a party group of sitting hereditary peers. A standing order of the House, approved prior to the commencement of the House of Lords Act 1999, mandated that the 90 elected hereditary peers consisted of: 2 peers elected by the Labour hereditary peers 42 peers elected by the Conservative hereditary peers 3 peers elected by the Liberal Democrat hereditary peers 28 peers elected by the crossbench hereditary peers 15 peers elected by the whole House By convention, whole-House elections elected members of the same affiliation as the departed peer.For example:

These numbers elected by each group reflected the relative strengths of the parties among hereditary peers in 1999; this allocation remained unchanged.

Candidature for both the 1999 elections and subsequent by-elections were restricted to peers in the Peerages of England, Scotland, Great Britain and the United Kingdom. Peers in the Peerage of Ireland were only eligible for election if they held a title in one of the other peerages, but if successful they could use their Irish peerage title as a member of the House.

A small number of hereditary peers have sat in the Lords by virtue of their being granted life peerages (see listing) without having been excepted hereditary peers. These are not listed below.

The House of Lords (Hereditary Peers) Act 2026, which excluded the hereditary peers from the House at the end of the 2024–2026 parliamentary session, was passed in March 2026 after a compromise with the Conservative party which would allow some of their hereditary peers as well as some crossbench hereditary peers to remain in the house as life peers.

Ex officio members Earl Marshal The Earl Marshal is an hereditary post held by the Duke of Norfolk. Hereditary peer and title used in the LordsTenureMiles Fitzalan-Howard, 17th Duke of NorfolkEdward Fitzalan-Howard, 18th Duke of Norfolkpresent

Lord Great Chamberlain The Lord Great Chamberlain is an hereditary office in gross post among the Cholmondeley, Heathcote-Drummond-Willoughby and Carington families.

In 1902 it was ruled by the House of Lords that the then joint office holders (the 1st Earl of Ancaster, the 4th Marquess of Cholmondeley, and the Earl Carrington, later Marquess of Lincolnshire) had to agree on a deputy to exercise the office, subject to the approval of the Sovereign. Should there be no such agreement, the Sovereign should appoint a deputy until an agreement be reached.

In 1912 an agreement was reached. The office, or right to appoint the person to exercise the office, would thereafter rotate among the three joint office holders and their heirs after them, changing at the start of each successive reign. Cholmondeley and his heirs would serve in every other reign; Ancaster and Carrington would each serve once in four reigns.Great Officers of State: The Lord Great Chamberlain and The Earl Marshal . The Royal Family. debretts.com . Debrett's Limited. Accessed 17 September 2013. Hereditary peer and title used in the LordsTenureDavid Cholmondeley, 7th Marquess of CholmondeleyRupert Carington, 7th Baron Carringtonpresent

Elected by the whole House Hereditary peer and title used in the Lords PartyFirst satElectedReplacingLeft HouseDiedDavid Kenworthy, 11th Baron StrabolgiLabour1953Morys Bruce, 4th Baron AberdareConservative1957Charles Lyell, 3rd Baron LyellConservative1960Hugh Mackay, 14th Lord ReayConservative1964Anthony Hamilton-Smith, 3rd Baron ColwynConservative1967Michael Brougham, 5th Baron Brougham and VauxConservative1968Rodney Elton, 2nd Baron EltonConservative1973Roger Bootle-Wilbraham, 7th Baron SkelmersdaleConservative1974Euan Geddes, 3rd Baron GeddesConservative1975Margaret of Mar, 31st Countess of MarCrossbencher1975Geoffrey Russell, 4th Baron AmpthillCrossbencher1976Lucius Cary, 15th Viscount FalklandCrossbencher1984George Makgill, 13th Viscount of OxfuirdConservative1987Jan David Simon, 3rd Viscount SimonLabour1994Robert Methuen, 7th Baron MethuenLiberal Democrats1994Nicholas Lowther, 2nd Viscount UllswaterConservative1963George Makgill, 13th Viscount of OxfuirdJohn Eccles, 2nd Viscount EcclesConservative1999Morys Bruce, 4th Baron AberdareDavid Pollock, 3rd Viscount HanworthLabour1996David Kenworthy, 11th Baron StrabolgiCharles Colville, 5th Viscount Colville of CulrossCrossbencher2011Geoffrey Russell, 4th Baron AmpthillJamie Borwick, 5th Baron BorwickConservative2013Hugh Mackay, 14th Lord ReayRaymond Asquith, 3rd Earl of Oxford and AsquithCrossbencher2014Robert Methuen, 7th Baron MethuenAlastair Campbell, 4th Baron ColgrainConservative2017Charles Lyell, 3rd Baron LyellAeneas Mackay, 15th Lord ReayConservative2019Roger Bootle-Wilbraham, 7th Baron SkelmersdaleRichard Denison, 9th Baron LondesboroughCrossbencher1996Margaret of Mar, 31st Countess of MarJasset Ormsby-Gore, 7th Baron HarlechConservative2021Rodney Elton, 2nd Baron EltonDavid Hacking, 3rd Baron HackingLabour1971Jan David Simon, 3rd Viscount SimonMassey Lopes, 4th Baron RoboroughConservative2022Nicholas Lowther, 2nd Viscount UllswaterTimothy Elliot-Murray-Kynynmound, 7th Earl of MintoConservative2022Anthony Hamilton-Smith, 3rd Baron ColwynJohn Russell, 7th Earl RussellLiberal Democrat2023Lucius Cary, 15th Viscount FalklandSitting as life peer William Stonor, 8th Baron CamoysConservative2023Michael Brougham, 5th Baron Brougham and Vaux

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Elected by the Conservative hereditary peers Hereditary peer and title used in the LordsFirst satElectedReplacingLeft HouseDiedEdward Douglas-Scott-Montagu, 3rd Baron Montagu of Beaulieu1947Bertram Bowyer, 2nd Baron Denham1949Robert Shirley, 13th Earl Ferrers1955David Trefgarne, 2nd Baron Trefgarne1962Malcolm Mitchell-Thomson, 3rd Baron Selsdon1963Charles Stourton, 26th Baron Mowbray1965Edward Foljambe, 5th Earl of Liverpool1969Malcolm Sinclair, 20th Earl of Caithness1969Michael Onslow, 7th Earl of Onslow1971John Palmer, 4th Earl of Selborne1971William Astor, 4th Viscount Astor1973William Peel, 3rd Earl Peel1973Patrick Stopford, 9th Earl of Courtown1975Ivon Moore-Brabazon, 3rd Baron Brabazon of Tara1976Simon Arthur, 4th Baron Glenarthur1977Roger Swinfen Eady, 3rd Baron Swinfen1977James Dugdale, 2nd Baron Crathorne1977Oliver Eden, 8th Baron Henley1978Charles Chetwynd-Talbot, 22nd Earl of Shrewsbury1981Robin Bridgeman, 3rd Viscount Bridgeman1983Arthur Gore, 9th Earl of Arran1983Alexander Scrymgeour, 12th Earl of Dundee1983Frederick Curzon, 7th Earl Howe1984John Astor, 3rd Baron Astor of Hever1986Thomas Galbraith, 2nd Baron Strathclyde1986David Verney, 21st Baron Willoughby de Broke1986Giles Goschen, 4th Viscount Goschen1988Benjamin Mancroft, 3rd Baron Mancroft1988Richard Fletcher-Vane, 2nd Baron Inglewood1989James Lindesay-Bethune, 16th Earl of Lindsay1989Francis Baring, 6th Baron Northbrook1991Nicholas Vivian, 6th Baron Vivian1991Ralph Palmer, 12th Baron Lucas1992John Attlee, 3rd Earl Attlee1992Hugh Lawson, 6th Baron Burnham1993David Carnegie, 14th Earl of Northesk1994James Graham, 8th Duke of Montrose1995Robin Dixon, 3rd Baron Glentoran1995Arthur Lawson Johnston, 3rd Baron Luke1996Robin Cayzer, 3rd Baron Rotherwick1996David Douglas-Home, 15th Earl of Home1996Colin Moynihan, 4th Baron Moynihan1997Hugh Trenchard, 3rd Viscount Trenchard1987Nicholas Vivian, 6th Baron VivianRupert Ponsonby, 7th Baron de Mauley2005Hugh Lawson, 6th Baron BurnhamCharles Cathcart, 7th Earl Cathcart1999Charles Stourton, 26th Baron MowbrayJames Younger, 5th Viscount Younger of Leckie2010David Carnegie, 14th Earl of NortheskHenry Ashton, 4th Baron Ashton of Hyde2011Michael Onslow, 7th Earl of OnslowMatthew White Ridley, 5th Viscount Ridley2013Robert Shirley, 13th Earl FerrersCharles Wellesley, 9th Duke of Wellington2015Arthur Lawson Johnston, 3rd Baron LukeNicholas Fairfax, 14th Lord Fairfax of Cameron1977Edward Douglas-Scott-Montagu, 3rd Baron Montagu of BeaulieuJames Bethell, 5th Baron Bethell2018Robin Dixon, 3rd Baron GlentoranGuy Mansfield, 6th Baron Sandhurst2021John Palmer, 4th Earl of SelborneThomas Coke, 8th Earl of Leicester2021Bertram Bowyer, 2nd Baron DenhamSebastian Grigg, 4th Baron Altrincham2021Malcolm Mitchell-Thomson, 3rd Baron SelsdonIan Macpherson, 3rd Baron Strathcarron2022Matthew White Ridley, 5th Viscount RidleyJonathan Berry, 5th Viscount Camrose2022Robin Cayzer, 3rd Baron RotherwickPhilip Remnant, 4th Baron Remnant2022Ivon Moore-Brabazon, 3rd Baron Brabazon of TaraClifton Wrottesley, 6th Baron Wrottesley1993Roger Swinfen Eady, 3rd Baron SwinfenEdward Howard, 8th Earl of Effingham2022John Astor, 3rd Baron Astor of HeverMark Cubitt, 5th Baron Ashcombe2022David Douglas-Home, 15th Earl of Home

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Elected by the Crossbencher hereditary peers