Sir Arthur Moseley Channell, QC (13 November 1838 - 4 October 1928) was an English rower and High Court judge.
Channell was the son of William Fry Channell of Hyde Park Gardens, who was later Baron Channell, of the Court of Exchequer. He was educated at Harrow School and admitted to Trinity College, Cambridge on 24 October 1856. A noted oarsman, Channell won the Colquhoun sculls in 1860. In 1861 he won the Magdalene Silver Oars. With First Trinity Boat Club he won the Grand Challenge Cup and Ladies' Challenge Plate at Henley Royal Regatta. He was runner up in Silver Goblets and lost the Wyfold Challenge Cup to Woodgate’s Brasenose crew.
Channell was admitted at the Inner Temple on 24 January 1859 and was called to the bar in 1863. He became Queen's Counsel in 1885. Channell was Recorder of Rochester and also a member of the Council of Legal Education from 1888 to 1897. He became a bencher in 1891 and was vice-chairman of the General Council of the Bar from 1896 to 1897. He was knighted in 1897 when he became a Judge of the High Court. In 1914 he retired and became a Privy Counsellor. He was a member of the Judicial Committee of the Privy Council Prize Court Appeals from 1916 to 1921.
Channell was also an experienced yachtsman and lived at Falmouth, Cornwall. He died at Falmouth aged 89.