J
| Title | Date of creation | Surname | Current status | Notes |
|---|---|---|---|---|
| James of Eltham | 27 August 1778 | James | extinct 1792 | |
| James of Langley Hall | 28 July 1791 | James | extant | second Baronet created Baron Northbourne in 1884 |
| Janssen of Wimbledon | 11 March 1715 | Janssen | extinct 1777 | |
| Jebb of Trent Place | 4 September 1778 | Jebb | extinct 1787 | |
| Lombe, later Jodrell of Sall Park | 22 January 1784 | Lombe, Jodrell | extinct 1929 | |
| Johnson of New York | 27 November 1755 | Johnson | extant | |
| Jones of Ramsbury | 27 May 1774 | Jones | extinct 1791 |
Read more about this topic: List Of Baronetcies In The Baronetage Of Great Britain