Theophilus Jones (18 October 1758 – 15 January 1812) was a Welsh lawyer, known as a historian of Brecknockshire.
Theophilus Jones was the son of Hugh Jones (d. 1799), vicar of Llangammarch and then Llywel, Brecknockshire, and a prebendary of the collegiate church of Brecon; and his wife, Elinor (d. 1786), daughter of the historian Theophilus Evans.
The death of his father gave him an additional degree of financial security, and following his appointment as deputy-registrar of the archdeaconry of Brecon, he sold his business in 1808 to have time to write.
Jones also published antiquarian communications in magazines, two papers in the Cambrian Register in 1795 and 1796, and another in Archaeologia, journal of the Society of Antiquaries of London, in 1814.
He planned to write a history of Radnorshire which, however, never materialised; and he began a translation of Ellis Wynne's romance Gweledigaethau y Bardd Cwsg (Visions of the Sleeping Bard).