| Primary title | Family seat | City townhouse |
|---|
| Duke of Abercorn | Baronscourt, County Tyrone | Corner of York Street and St Stephen's Green |
| Duke of Leinster | Maynooth Castle, County Kildare
Carton House, Maynooth
Kilkea Castle, County Kildare | Leinster House
13 Dominick Street |
| Marquess Conyngham | Slane Castle, County Meath | |
| Marquess of Donegall | Belfast Castle, County Antrim
Dunbrody House, County Wexford | |
| Marquess of Downshire | | |
| Marquess of Ely | Loftus Hall, County Wexford | |
| Marquess of Londonderry | Mount Stewart, County Down | |
| Marquess of Sligo | Westport House, County Mayo | |
| Marquess of Waterford | Curraghmore, County Waterford | Tyrone House |
| Earl of Aldborough | Belan Lodge, Moone, County Kildare
Stratford Lodge, County Wicklow
Mountneil House, County Carlow | Aldborough House, Dublin
Stratford House, London |
| Earl of Antrim | Glenarm Castle, County Antrim | Antrim House, Merrion Square |
| Earl of Bandon | Castle Bernard, County Offaly | |
| Earl of Bantry | Bantry House, County Cork | |
| Earl of Barrymore | Fota House, County Cork | |
| Earl of Bective | Headfort House | Bective House, Smithfield
Bective House, Parnell Square |
| Earl of Bellomont | Bellamont House, County Cavan | 15 Temple Street |
| Earl Belmore | Castle Coole, County Fermanagh | |
| Earl of Belvedere | Belvedere House, County Westmeath | Belvedere House |
| Earl of Bessborough | Stansted Park, West Sussex | |
| Earl of Charlemont | | Charlemont House |
| Earl of Clancarty | Garbally Court, County Galway | |
| Earl of Clare | Mountshannon House, County Limerick | |
| Earl of Clonmell | Bishopscourt, County Kildare
Eathorpe Hall, Warwickshire | Clonmell House, 17 Harcourt Street |
| Earl of Courtown | Courtown House, County Wexford | |
| Earl of Desart | Desart Court, County Kilkenny | |
| Earl of Drogheda | Moore Abbey, County Kildare | Drogheda House, North Earl Street |
| Earl of Dunraven and Mount-Earl | | |
| Earl of Enniskillen | Florence Court, County Fermanagh | |
| Earl of Fingall | Killeen Castle, Dunsany, County Meath | |
| Earl of Glandore | Ardfert Abbey, County Kerry | |
| Earl of Gosford | Gosford Castle, County Armagh | |
| Earl of Howth | Howth Castle, Fingal | |
| Earl of Kenmare | Killarney House, County Kerry | Kenmare House, North Great George's Street |
| Earl of Kilmorey | Mourne Park, County Down | |
| Earl of Kingston | Mitchelstown Castle, County CorkKing House, Boyle, County Roscommon | |
| Earl of Listowel | Convamore House, County Cork | |
| Earl of Mayo | Palmerstown House, County Kildare | |
| Earl of Meath | Kilruddery House, County Wicklow | Ardee House, Ardee Street |
| Earl of Milltown | Russborough House, County Wicklow | |
| Earl of Mornington | Dangan Castle, County Meath | Mornington House |
| Earl Mountbatten of Burma | Classiebawn Castle, County Sligo | |
| Earl Mount Cashell | Moore Park, County Cork
The Barne Estate, Clonmel, County Tipperary | |
| Earl of Portarlington | Emo Court, County Laois | |
| Earl of Roden | Tollymore Park, County Down | |
| Earl of Roscommon | | |
| Earl of Rosse | Birr Castle, County Offaly | |
| Earl of Shannon | Castlemartyr House, County Cork | |
| Earl of Westmeath | Clonyn Castle, County Westmeath | |
| Earl of Tyrconnell | Donegal Castle, County Donegal | |
| Earl of Tyrone | Tyrone House, Dublin | |
| Viscount Ashbrook | Castle Durrow, County Laois | |
| Viscount Baltinglass | San Antonia House, County Wicklow | |
| Viscount Bangor | Castle Ward, County Down | |
| Viscount Barnewall | Turvey House | |
| Viscount Charlemont | Roxborough Castle, County Tyrone | |
| Viscount Doneraile | Doneraile Court, County Cork | Doneraile House, 45 Kildare Street |
| Viscount FitzWilliam | Merrion Castle, County Dublin | |
| Viscount Gormanston | Gormanston Castle, County Meath | |
| Viscount Gough | St. Helen's, Booterstown, Dublin | |
| Viscount Hawarden | Dundrum House, County Tipperary | |
| Viscount Langford | Summerhill House, County Meath
Mount Campbell, County Leitrim
Langford Lodge, County Antrim | Langford House, Mary Street
Granby Row |
| Viscount Lifford | Meenglass House, County Donegal | |
| Viscount Massereene | Antrim Castle, County Antrim | |
| Viscount Powerscourt | Powerscourt House, County Wicklow | |
| Viscount de Vesci | Abbeyleix House, County Laois | |
| Baron Annaly | Luttrellstown Castle, Dublin | |
| Baron Barry of Santry | Santry Court | |
| Baron Bellew | Barmeath Castle, County Louth | |
| Baron Blayney | Blayney Castle, County Monaghan | |
| Baron Castlemaine | Moydrum Castle, County Westmeath | |
| Baron Carew | Donadea House, County Kildare | |
| Baron Clonbrock | Clonbrock Castle, County Galway | |
| Baron Cloncurry | Lyons Demesne, County Kildare | |
| Baron Crofton | Mote House, County Roscommon | |
| Baron Dunalley | Kilboy House, County Tipperary | |
| Baron of Dunsany | Dunsany Castle, County Meath | |
| Baron Hartland | Strokestown Park, County Roscommon | |
| Baron Inchiquin | Dromoland Castle, County Clare | |
| Baron Kingston | Rockingham, County Roscommon | |
| Baron Monteagle of Brandon | Mount Trenchard House, County Kerry | |
| Baron Muskerry | Springfield Castle, County Limerick | |
| Baron Rathdonnell | Lisnavagh House, County Carlow | |
| Baron Talbot de Malahide | Malahide Castle, Dublin | |
| Baron Trimlestown | Trimlestown, County Meath | |
| Baron Ventry | Burnham House, Dingle, County Kerry | | |
| Family name or title | Family seat | City townhouse |
|---|
| Babington family | Creevagh House, County Londonderry
Greenfort House, County Donegal | |
| Bagwell family | Marlfield House, County Tipperary | |
| Bernard family | Kinnitty Castle, County Offaly | |
| Bland family | Derryquin Castle, County Kerry | |
| Blennerhassett family | Ballycarty Castle, County Kerry | |
| Blunden baronets | Castle Blunden, County Kilkenny | |
| Boyd-Rochfort family | Middleton Park House, County Westmeath | |
| Burke baronets | Glinsk Castle, County Galway | |
| Chapman baronets | Killua Castle, County Westmeath | |
| Colthurst baronets | Blarney Castle, County Cork | |
| Conolly family | Castletown House, County Kildare | |
| Congreve family | Mount Congreve, County Waterford | |
| Cooper family | Markree Castle, County Sligo | |
| Cotter baronets | Rockforest, County Cork | |
| Darby family | Leap Castle, County Offaly | |
| Drought family | Droughtville, County Offaly
Lettybrook, County Offaly
Whigsborough, County Offaly | |
| Ennis baronets | Ballinahown Court, County Westmeath | |
| Esmonde baronets | Ballynastragh, County Wexford | |
| Eyre family | Eyrecourt Castle, County Galway | |
| Godfrey baronets | Bushfield House, County Kerry | |
| Gore-Booth baronets | Lissadell House, County Sligo | |
| Guinness family | Ashford Castle, County Mayo | |
| Herbert family | Muckross House, County Kerry | |
| Leslie clan | Castle Leslie, County Monaghan | |
| Levinge baronets | Knockdrin Castle, County Westmeath | |
| Lynch-Blosse baronets | Athavallie House, County Mayo | |
| Mac Aodhagáin clan | Redwood Castle, County Tipperary | |
| MacNamara clan | Knappogue Castle, County Clare | |
| Moore family | Moore Hall, County Mayo | |
| More O'Ferrall family | | |
| Musgrave baronets | Tourin House, County Waterford | |
| Nugent baronets | Ballinlough Castle, County Westmeath | |
| Osborne baronets (of Ballentaylor and Ballylemon) | Newtown Anner House, County Tipperary | |
| Otway family | Castle Otway, County Tipperary | |
| O'Brien baronets (Boris-in-Ossory) | | Merrion Square |
| Ó Cianáin family | Ardrass House, County Kildare | |
| O'Conor Don | Clonalis House, County Roscommon | |
| O'Dea clan | O'Dea Castle, County Clare | |
| O'Doherty family | Carrickabraghy Castle, County Donegal | |
| O'Donnell of Tyrconnell | | |
| O'Donoghue clan | Ross Castle, County Kerry | |
| O'Donovan clan | Castle Donovan, County Cork | |
| O'Farrelly family | Drumlane Abbey, County Cavan | |
| O'Farrell family | Longford, County Longford | |
| O'Flaherty clan | Aughnanure Castle, County Galway | |
| O'Grady family | Kilballyowen, County Limerick | |
| O'Higgins family | Ballynary, County Sligo | |
| O'Reilly clan | Cloughoughter Castle, County Cavan | |
| Piers baronets | Tristernagh Abbey, County Westmeath | |
| Richardson family | Richhill Castle, County Armagh | |
| Richardson-Bunbury baronets | Augher Castle, County Tyrone | |
| Saunderson family | Castle Saunderson, County Cavan | |
| Spring family | Killagha Abbey, County Kerry | |
| St George baronets | Tyrone House, County Galway | |
| Staples baronets | Lissan House, County Tyrone | |
| Stronge baronets | Tynan Abbey, County Armagh | |
| Tuite baronets | Sonnagh Castle, County Westmeath | |
| Vernon family | Clontarf Castle, Dublin | |
| Warren baronets | Warren's Court, County Cork | |
| Wynne family | Hazelwood House, County Sligo | 3 Henrietta Street | |
