There have been six baronetcies created for persons with the surname Thomas, three in the Baronetage of England, one in the Baronetage of Great Britain and two in the Baronetage of the United Kingdom. Two of the creations are extant as of 2016.
The Thomas Baronetcy, of Michaelstown in the County of Glamorgan, was created in the Baronetage of England on 3 March 1642 for Edward Thomas. The second Baronet, Robert Thomas, sat as Member of Parliament for Cardiff. The title became extinct on his death in 1685.
The Thomas Baronetcy, of Folkington in the County of Sussex, was created in the Baronetage of England on 23 July 1660 for William Thomas, for many years Member of Parliament for Seaford and Sussex. The title became extinct on his death in 1706.
The Thomas Baronetcy, of Wenvoe in the County of Glamorgan, was created in the Baronetage of England on 24 December 1694 for John Thomas. The third Baronet represented Chippenham and Glamorganshire in the House of Commons. The tenth Baronet was admitted to the Privy Council in 1958.
The Thomas Baronetcy, of Yapton in the County of Sussex, was created in the Baronetage of Great Britain on 6 September 1766 for George Thomas, Governor of the Leeward Islands from 1753 to 1766. The third Baronet sat as Member of Parliament for Arundel. The seventh Baronet was a prominent chess player. The title became extinct on his death in 1972.
The Thomas Baronetcy, of Garreglwyd in the County of Anglesey, was created in the Baronetage of the United Kingdom on 5 July 1918 for Robert Thomas. He was a ship and insurance broker and also represented Wrexham and Anglesey in the House of Commons.
The Thomas Baronetcy, of Ynyshir in the County of Glamorgan, was created in the Baronetage of the United Kingdom on 10 May 1919 for the coalowner and philanthropist James Thomas. He constructed the Welsh National Medical School in Cardiff and also served as high sheriff of Glamorganshire in 1936. His son, the second Baronet, was a deputy lieutenant and High Sheriff for Monmouthshire. As of 2012 the title is held by the latter's son, the third Baronet, who succeeded in 2005.
There is no heir to the title.[1]
| Escutcheon: | Per pale Gules and Azure on a chevron Argent between in dexter chief a sower scattering seed and in sinister chief on eagle displayed both Or and in base a garb of the last three fleurs-de-lis Sable. |
| Crest: | On the waves of the sea Proper between two anchors Sable a ship in full sail Proper. |
| Motto: | Fac Recte Et Nil Time[4] |
The heir presumptive to the baronetcy is Stephen Francis Thomas (born 1951), 2nd and youngest son of the 2nd Baronet and brother of the current occupant. His heir apparent is his eldest son, Toby James Thomas (born 1988).