This is a list of people who have served as Custos Rotulorum of Cardiganshire.
The titles of Baron Fethard, of Feathered in the County of Tipperary, and Viscount Lisburne, were created in the Peerage of Ireland in 1695 for John Vaughan, Member of Parliament for Cardiganshire and also Lord Lieutenant of that county.
From 1711 to 1714, he was Puisne Justice of the Great Sessions for Carmarthenshire, Cardiganshire, and Pembrokeshire, and was Puisne Justice of Chester from 1714 until his death.
He was the son of Sir Humphrey Mackworth of Gnoll, Glamorganshire, MP for Cardiganshire and was educated at Westminster School, Magdalen College, Oxford and the Inner Temple.
Matthew Vaughan-Davies, 1st Baron Ystwyth (1840–1935), Welsh Liberal Party politician, M.P. for Cardiganshire,1895–1921
He was appointed Constable and Lieutenant of Breconshire, Chamberlain of Carmarthenshire and Cardiganshire, Seneschall and Chancellor of Haverfordwest, Rouse and Builth, Justiciar of South Wales, and Governor of all Wales.