Ers 1999 rydym wedi cael cyfrifoldeb dros nifer o dribiwnlysoedd a hefyd wedi sefydlu rhai newydd ein hunain. Mae Tribiwnlysoedd Cymru, fel y'u diffinnir yn Neddf Cymru 2017, yn cynnwys Panel Dyfarnu Cymru, Tribiwnlys Tir Amaethyddol Cymru, Tribiwnlys Adolygu Iechyd Meddwl Cymru, Tribiwnlys Eiddo Preswyl Cymru, Tribiwnlys Anghenion Addysgol Arbennig Cymru a Thribiwnlys y Gymraeg.
Since 1999 we have acquired responsibility for a number of tribunals and also established new ones ourselves. The Welsh Tribunals, defined in the Wales Act 2017, comprise the Adjudication Panel for Wales, the Agricultural Land Tribunal for Wales, the Mental Health Review Tribunal for Wales, the Residential Property Tribunal for Wales, the Special Educational Needs Tribunal for Wales and the Welsh Language Tribunal.