The Lord Deputy was the representative of the monarch and head of the Irish executive under English rule, during the Lordship of Ireland and then the Kingdom of Ireland. He deputised prior to 1523 for the Viceroy of Ireland. The plural form is Lords Deputy.

List of Lords Deputy

Lordship of Ireland Portrait or ArmsNameNationalityTerm of officeMonarchTook officeLeft officeTime in officeThomas de la DaleEnglish13651366Edward IIIThomas MortimerEnglish13821383Richard IIThomas FitzGerald, 7th Earl of KildareAnglo-Irish14541459Henry VIWilliam SherwoodEnglish14621462Edward IVThomas FitzGerald, 7th Earl of DesmondAnglo-Irish14631467John Tiptoft, 1st Earl of WorcesterEnglish14671468Thomas FitzGerald, 7th Earl of KildareAnglo-Irish14681475Henry VIEdward IVWilliam SherwoodEnglish14751477Gerald FitzGerald, 8th Earl of KildareAnglo-Irish14771477Henry Grey, 4th Baron Grey of CodnorEnglish14781479Gerald FitzGerald, 8th Earl of KildareAnglo-Irish1479?1494Edward VRichard IIIHenry VIIWalter FitzsimonAnglo-Irish14921492Robert Preston, 1st Viscount GormanstonAnglo-Irish14931494Edward PoyningsEnglish14941496Gerald FitzGerald, 8th Earl of KildareAnglo-Irish14961513Henry VIIIGerald FitzGerald, 9th Earl of KildareAnglo-Irish15131518Sir Maurice FitzgeraldAnglo-IrishThe Chronological HistorianThomas Howard, Earl of SurreyEnglish15201522Piers Butler, 8th Earl of OrmondAnglo-Irish15221524Gerald FitzGerald, 9th Earl of KildareAnglo-Irish15241529William SkeffingtonEnglish15291532Gerald FitzGerald, 9th Earl of KildareAnglo-Irish15321534William SkeffingtonEnglish15341535Leonard Grey, 1st Viscount GraneEnglish15361540

Kingdom of Ireland Portrait or ArmsNameNationalityTerm of officeMonarchTook officeLeft officeTime in officeAnthony St LegerEnglish15401548Edward VIEdward BellinghamEnglish15481549Lord Justices15491550Anthony St LegerEnglish15501551James CroftEnglish15511552Lord Justices (1552–1553)Anthony St LegerEnglish15531556Mary IThomas Radclyffe, 3rd Earl of SussexEnglish15561558Wagner, John, Historical Dictionary of the Elizabethan World, Oryx, 1999, p. 252Thomas Radclyffe, 3rd Earl of Sussex(as Lord Lieutenant)English15601564Elizabeth IWagner, John, Historical Dictionary of the Elizabethan World, Oryx, 1999, p. 252Nicholas ArnoldEnglish15641565Henry SidneyEnglish15651571Wagner, John, Historical Dictionary of the Elizabethan World, Oryx, 1999, p. 278William FitzWilliamEnglish15711575Henry SidneyEnglish15751578Wagner, John, Historical Dictionary of the Elizabethan World, Oryx, 1999, p. 278Arthur Grey, 14th Baron Grey de WiltonEnglish15801582John PerrotWelsh15841588William FitzWilliamEnglish15881594William Russell, 1st Baron Russell of ThornhaughEnglishAppointed 16 May 1594; sworn in 11 August 15941597Thomas Burgh, 3rd Baron BurghEnglish15971597Robert Devereux, 2nd Earl of EssexEnglish15991599Charles Blount, 8th Baron Mountjoy(as Lord Lieutenant 1603–1604)English16001603James VI and IGeorge CareyEnglish16031604Arthur Chichester, 1st Baron ChichesterEnglish16051616. became Lord Deputy in February 1605.Oliver St John, 1st Viscount GrandisonEnglish16161622Cokayne, and others, The Complete Peerage, volume VI, page 74Henry Cary, 1st Viscount FalklandEnglish16221629Charles IThomas Wentworth, 1st Earl of StraffordEnglish16321640Christopher WandesfordEnglish16401640Robert Sidney, 2nd Earl of Leicester (as Lord Lieutenant)English16401643James Butler, 1st Duke of Ormond

(as Lord Lieutenant)Anglo-Irish16441650Henry IretonEnglish16501651Charles FleetwoodEnglish16521657Henry Cromwell (as Lord Lieutenant 1658–1659)English16571658Edmund LudlowEnglish16591660George Monck, 1st Duke of AlbemarleEnglish16601661James Butler, 1st Duke of OrmondAnglo-Irish16621668Thomas Butler, 6th Earl of OssoryAnglo-Irish16681669John Robartes, 1st Earl of RadnorEnglish16691670John Berkeley, 1st Baron Berkeley of Stratton16701672Arthur Capell, 1st Earl of EssexEnglish16721677James Butler, 1st Duke of OrmondAnglo-Irish16771682Richard Butler, 1st Earl of ArranAnglo-Irish16821684James Butler, 1st Duke of OrmondAnglo-Irish16841685Lords Justices24 February 1685Henry Hyde, 2nd Earl of ClarendonEnglish16851687Richard Talbot, 1st Earl of TyrconnellIrish16871688 The title subsequently became Lord Lieutenant of Ireland, with the holder also known informally as the Viceroy.

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