The Mathias Baronetcy, of Vaendre Hall in St Mellons in the County of Monmouth, was a title in the Baronetage of the United Kingdom.
It was created on 28 June 1917 for the Liberal politician Richard Mathias.
He was a partner of J. Mathias & Sons, shipowners, of Cardiff, and represented Cheltenham in the House of Commons from 1910 to 1911.
He was later a deputy lieutenant of Monmouthshire.
The baronetcy became extinct on the death in 1991 of his son, the second baronet.