Sir Alun Talfan Davies QC (22 July 1913 – 11 November 2000) was a Welsh judge, publisher and Liberal politician.
Alun Talfan Davies was born at Gorseinon near Swansea, the youngest son of the Calvinistic Methodist minister William Talfan Davies (1873–1938) and his wife Alys, née Jones (1878–1948). He was the brother of Aneirin Talfan Davies. He was educated at Gowerton grammar school. He read law at the University of Wales, Aberystwyth, and at Gonville and Caius College, Cambridge. In 1942, he married Eiluned Christopher Williams. He had one son and three daughters. In 1969 his daughter Janet married the Welsh Rugby international Barry John. He died at his home in Penarth on 1 November 2000.
Davies entered Gray's Inn and qualified as a barrister just before the outbreak of World War II. As a barrister he specialised in industrial cases and was retained by the National Union of Mineworkers. He was appointed as a QC in 1961.
Davies was a counsel to the public enquiry into Aberfan tip disaster of 1966. From 1967 to 1990 he was Chairman of the Trustees of the Aberfan Fund, which allocated the money raised by public subscription following the disaster.
Davies sat as a recorder (a part-time circuit judge) from 1963 to 1972 and as a full-time circuit judge from 1972 to 1986.