Viscountcies in the Peerage of Ireland
extant from 1603 to 1700
- Viscount Gormanston 1478 Preston extant forfeit 1691 to 1800
- Viscount Mountgarret 1550 Butler extant
- Viscount Butler of Tullephelim 1603 Butler extinct 1613
- Viscount Powerscourt 1618 Wingfield extinct 1634
- Viscount Grandison 1620 St John,Villiers extant created Earl Grandison 1721 and merged with Earl of Jersey 1766
- Viscount Valentia 1621 Power extinct 1622
- Viscount Beaumont of Swords 1622 Beaumont extinct 1702
- Viscount Dillon1622 Dillon extant
- Viscount Netterville 1622 Netterville extinct 1854
- Viscount Somerset 1626 Somerset extinct 1649
- Viscount Baltinglass 1627 Roper extinct 1672
- Viscount Mayo 1627 Bourke extinct 1767
- Viscount Castleton 1627 Saunderson extinct 1723 created Viscount Castleton again in 1716 and Earl Castleton in 1720.
- Viscount Chaworth 1628 Chaworth extinct 1693
- Viscount Scudamore 1628 Scudamore extinct 1716
- Viscount Strangford 1628 Smythe extinct 1869 created Baron Penshurst (UK) in 1825
- Viscount Wenman 1628 Wenman extinct 1800
- Viscount Lumley of Waterford 1628 extant also Baron Lumley 1681 Viscount Lumley 1689 Earl of Scarbrough 1690 in England
- Viscount Monson of Castlemaine 1628 forfeit 1661no known supporters
- Viscount Fitzwilliam 1629 Fitzwilliam extinct 1833 created Earl of Tyrconnel in 1661, extinct 1667
- Viscount Fairfax of Emley 1629 Fairfax extinct 1772
- Viscount Clanmalier 1631 O'Dempsey extinct 1691
- Viscount Cullen 1642 Cokayne, Bertie extinct 1938 merged with Earl of Lindsay 1810
- Viscount Carrington 1643 Smyth extinct 1706
- Viscount Tracy 1643 Tracy extinct 1797
- Viscount Bulkeley 1644 Bulkeley extinct 1822 also Baron Bulkeley in the Peerage of Great Britain from 1784
- Viscount Bellomont 1645 Bard extinct 1667
- Viscount Brouncker 1645 Brouncker extinct 1688
- Viscount Barnewall 1646 Barnewall extinct 1834 dormant from 1800 to 1814
- Viscount Galmoyne 1646 Butler forfeit 1696 Earl of Newcastle in the Jacobite peerage
- Viscount Tara 1650 Preston extinct 1674
- Viscount Dungannon 1662 Trevor extinct 1706
- Viscount Shannon 1660 Boyle extinct 1699
- Viscount Massereene 1660 Clotworthy,Skeffington extant also Viscount Ferrard after 1831
- Viscount Cholmondeley 1661 Cholmondeley extant created Earl of Cholmondeley in 1706 in the Peerage of England and in 1815 Marquess of Cholmondeley in the Peerage of the United Kingdom
- Viscount Clare 1662 O'Brien extinct 1774
- Viscount Fitzhardinge 1663 extinct 1712 also Earl of Falmouth in England 1664-1665
- Viscount Powerscourt 1665 Wingfield extinct 1717
- Viscount Blessington 1673 Boyle extinct 1732
- Viscount Downe 1675 Ducie extinct 1679
- Viscount Lanesborough 1676 Lane extinct 1724
- Viscount Downe 1680 Dawnay extant
- Viscount Lisburne 1685 Loftus extinct 1691
- Viscount Hewitt of Gowran 1689 Hewitt extinct 1689
- Viscount Windsor 1699 Windsor extinct 1758 also Baron Mountjoy in Great Britain
Viscount Gormanston 1478
Viscount Montgarret 1550
Viscount Butler of Tullephelim 1603
Viscount Powerscourt 1618, 1665 and 1744
Viscount Grandison and Baron Tregoz 1620
Viscount Grandison 1620
Viscount Valentia 1621
Viscount Beaumont of Swords 1622
Viscount Dillon 1622
Viscount Netterville 1622
Viscount Somerset 1626
Viscount Baltinglass 1627
Viscount Mayo 1627
Viscount Castleton 1627
Viscount Chaworth 1628
Viscount Scudamore 1628
Viscount Strangford 1628
Viscount Wenman 1628
Viscount Lumley of Waterford 1628
Viscount Fitzwilliam 1629
Viscount Fairfax of Emley 1629
Viscount Clanmalier 1631
Viscount Cullen 1642
Viscount Carrington 1643
Viscount Tracy 1643
Viscount Bulkeley 1644
Viscount Bellomont 1645
Viscount Brouncker 1645
Viscount Barnewall 1646
Viscount Galmoyne 1646
Viscount Tara 1650
Viscount Dungannon 1662
Viscount Shannon 1660
Viscount Massereene 1660
Viscount Cholmondeley 1661
Viscount Clare 1662
Viscount Fitzhardinge 1664
Viscount Blessington 1673
Viscount Downe 1675
Viscount Lanesborough 1676
Viscount Downe 1680
Viscount Lisburne 1685
Viscount Hewitt of Gowran 1689
Viscount Windsor 1699
1700-1806
- Viscount Howe 1701 Howe extinct 1814
- Viscount Doneraile 1703 StLeger extinct 1767
- Viscount Mountcashell 1706 Davys extinct 1736
- Viscount Molesworth of Swords 1716 Molesworth extant
- Viscount Allen 1717 Allen extinct 1845
- Viscount Boyne 1717 Hamilton extant Baron Brancepeth in the Peerage of the United Kingdom from 1866
- Viscount Chetwynd 1717 Chetwynd extant
- Viscount Midleton 1717 Brodrick extant created Earl of Midleton in the Peerage of the United Kingdom 1920-79
- Viscount Tyrconnel 1718 Brownlow extinct 1754
- Viscount Fane 1718 Fane extinct 1766
- Viscount Grimston 1719 Grimston extant created Baron Verulam in 1790 created Earl of Verulam in 1815 all in the Peerage of Great Britain
- Viscount Barrington 1720 Barrington extinct 1990 created Baron Shute in the Peerage of the United Kingdom in 1880
- Viscount Blundell 1720 Blundell extinct 1756
- Viscount Gage 1720 Gage extant
- Viscount Vane 1720 Vane extinct 1789
- Viscount Palmerston 1723 Temple extinct 1865
- Viscount Bateman 1725 Bateman extinct 1802
- Viscount Micklethwaite 1727 Micklethwaite extinct 1734
- Viscount Galway 1727 Monckton later Arundell-Monckton extant
- Viscount Powerscourt 1744 Wingfield extant
- Viscount Ashbrook 1751 Flower extant
- Viscount Mountmorres of Castlemorres 1763 Morres, De Montmorency extinct 1951
- Viscount Dungannon 1765 Hill-Trevor extinct 1862
- Viscountess Langford 1766 Upton, Rowley extinct 1796
- Viscount Mountcashell of the City of Cashell 1766 Moore extinct 1915
- Viscount Southwell 1776 Southwell extant
- Viscount de Vesci 1776 Vesey extant
- Viscount Bangor 1781 Ward extant
- Viscount Pery 1781 Pery extinct 1806
- Viscount Melbourne 1781 Lamb extinct 1853
- Viscount Lifford 1781 Hewitt extant
- Viscount Clifden 1781 Agar extinct 1974
- Viscount Doneraile 1785 St Leger extant
- Viscount Cremorne 1785 Dawson extinct 1813
- Viscount Harberton 1791 Pomeroy extant
- Viscount Hawarden 1793 Maude extant created Earl de Montalt in the Peerage of the United Kingdom 1886-1905
- Viscount Ferrard 1797 Foster,Skeffington extant also Viscount Massereene after 1831
- Viscount Carleton of Clare 1797 Carleton extinct 1826
- Viscount Longueville 1800 Longfield extinct 1811
- Viscount Avonmore 1800 Yelverton dormant 1910
- Viscount Charleville 1800 Bury extinct 1875 created Earl of Charleville in 1806
- Viscount Monck of Ballytrammon 1801 Monck extant
- Viscount Newcomen 1803 Gleadowe-Newcomen extinct 1825
- Viscount Lorton 1806 King extant, succeeded as 6th Earl of Kingston in 1869
- Viscount Templetown 1806 Upton extinct 1981
- Viscount Castlemaine 1822 Handcock extinct 1839
- Viscount Gort 1816 Prendergast-Smyth,Vereker extant
- Viscount Frankfort de Montmorency 1816 de Montmorency extinct 1917
- Viscount Guillamore 1831 O'Grady extinct 1955
Viscount Howe 1701
Viscount Doneraile 1703 and 1785
Viscount Mountcashell 1706
Viscount Molesworth of Swords 1716
Viscount Allen 1717
Viscount Boyne 1717
Viscount Chetwynd 1717
Viscount Midleton 1717
Viscount Tyrconnel 1718
Viscount Fane 1718
Viscount Grimston 1719
Viscount Barrington 1720
Viscount Blundell 1720
Viscount Gage 1720
Viscount Vane 1720
Viscount Palmerston 1723
Viscount Bateman 1725
Viscount Micklethwaite 1727
Viscount Galway 1727
Viscount Ashbrook 1751
Viscount Mountmorres of Castlemorres 1763
Viscount Dungannon 1765
Viscount Langford 1766
Viscount Southwell 1776
Viscount de Vesci 1776
Viscount Bangor 1781
Viscount Pery 1781
Viscount Melbourne 1781
Viscount Lifford 1781
Viscount Clifden 1781
Viscount Cremorne 1785
Viscount Harberton 1791
Viscount Hawarden 1793
Viscount Ferrard 1797
Viscount Carleton of Clare 1797
Viscount Longueville 1800
Viscount Avonmore 1800
Viscount Newcomen 1803
Viscount Lorton 1806
Viscount Templetown 1806
Viscount Castlemaine 1822
Viscount Gort 1816
Viscount Frankfort de Montmorency 1816
Viscount Guillamore 1831