L
| Title | Date of creation | Surname | Current status | Notes |
|---|---|---|---|---|
| Lake of Carnow | 1661 | Lake | extinct 1674 | |
| Lane of Tulske | 1661 | Lane | extinct 1724 | second Baronet created Viscount Lanesborough in 1676 |
| Langford of Kilmackedrett | 1667 | Langford | extinct c.1725 | |
| Langrishe of Knocktopher | 1777 | Langrishe | extant | |
| Lawless of Abington | 1776 | Lawless | extinct 1929 | first Baronet was created Baron Cloncurry in 1789 |
| Leigh of Tyrone | 1622 | Leigh | extinct 1638 | |
| Leslie of Tarbert | 1787 | Leslie | extinct 1818 | |
| Levinge of Knockdrin Castle | 1704 | Levinge | extant | |
| Lighton of Merville | 1791 | Lighton | extant | |
| Loftus of Mount Loftus | 1768 | Loftus | extinct 1864 | |
| Lumm of Lumville | 1775 | Lumm | extinct 1797 | |
| Lynch-Blosse of Galway | 1622 | Lynch, Lynch-Blosse | extant |
Read more about this topic: List Of Baronetcies In The Baronetage Of Ireland