1501-1600
| Title | Date of Creation | Surname | Current Status | Notes |
|---|---|---|---|---|
| Baron Kilcullen | 1535 | Eustace | forfeit 1585 | subsidiary title of the Viscount Baltinglass |
| Baron Odorney | 1537 | Fitzmaurice | extinct 1541 | subsidiary title of the Viscount Kilmaule, also Baron Kerry, a title now held by the Marquess of Lansdowne |
| Baron Offaly | 1538 | O Conor Faly | 1552 | |
| Baron Carbery | 1541 | de Bermingham | extinct c. 1560 | |
| Baron Louth | 1541 | Plunkett | extant | |
| Baron Upper Ossory | 1541 | Fitzpatrick | forfeit 1691 | |
| Baron Dungannon | 1542 | O'Neill | extinct after 1542 | |
| Baron Dunkellin | 1543 | de Burgh | extinct 1916 | subsidiary title of the Earl of Clanricarde, also Baron Somerhill and Viscount Tunbridge in England from 1624 and Baron Imanney, Viscount Galway and Earl of St Albans in England from 1628, also Marquess of Clanricarde in Ireland from 1646 to 1657, from 1789 to 1797 and from 1825, also Earl of Clanricarde in Ireland from 1800 (a title which is extant and now held by the Marquess of Sligo), also Baron Somerhill in the United Kingdom from 1826 |
| Baron Ibrackan | 1543 | O'Brien | forfeit 1741 | also Earl of Thomond from 1551, also Viscount Tadcaster in Great Britain from 1714 |
| Baron Inchiquin | 1543 | O'Brien | extant | also Earl of Inchiquin from 1654 to 1855 and Marquess of Thomond from 1800 to 1855 |
| Baron of Kells | 1550 | Butler | extant | subsidiary Feudal Barony title of the Viscount Mountgarret, also Earl of Kilkenny from 1793 to 1846, also Baron Mountgarret in the United Kingdom from 1911 |
| Baron of Ballyane | 1554 | Kavanagh | extinct 1555 | Life peerage |
| Baron Valentia | 1556 | McCarthy | resigned 1597 | subsidiary title of the Earl of Clancare |
| Baron of Ballyane | 1558 | Kavanagh | extinct after 1558 | Life peerage |
| Baron Dromana | 1569 | Fitzgerald | extinct 1572 | subsidiary title of the Viscount Decies |
| Baron Clogher | 1578 | O'Neill | extinct 1595 | subsidiary title of the Earl of Clanconnel |
| Baron of Ardenerie | 1580 | Bourke | dormant 1591 | |
| Baron Bourke of Castleconnell | 1580 | Bourke | forfeit 1691 | |
| Baron Cahir | 1583 | Butler | extinct 1858 | also Viscount Cahir and Earl of Glengall from 1816 |
| Baron Leitrim | 1583 | de Burgh (or Burke) | Forfeit 1600 | |
| Baron Dungannon | 1587 | O'Neill | forfeit 1612 | |
| Baron Inchiquin | 1600 | Fitzgerald | extinct 1601 | subsidiary title of the Earl of Desmond |
Read more about this topic: List Of Baronies In The Peerage Of Ireland