Sir Arthur William Steuart Cochrane KCVO (27 April 1872 – 11 January 1954) was a long-serving officer of arms at the College of Arms in London.
Arthur Cochrane was the third son of Rev. David Crawford Cochrane, Master of Etwall Hospital (almshouses) and his wife Jane Tomlinson. He was born at Etwall Lodge and educated at Repton School. After serving for a term as secretary to Sir Alfred Scott-Gatty, Garter King of Arms, his heraldic career began on 19 July 1904 when he was appointed Rouge Croix Pursuivant of Arms in Ordinary. Cochrane took part in the coronation of King George V and was made MVO in 1911. In 1915 he was promoted to the office of Chester Herald of Arms in Ordinary and held this office until 1926 when he was promoted to Norroy King of Arms. Two years later, on the death of Gordon Ambrose de Lisle Lee, Cochrane was chosen to succeed him as Clarenceux King of Arms on 26 July 1928. Cochrane was made CVO in 1931 and in 1934, was appointed Advisor on Naval Badges in succession to Major Foulkes its originator. Commander P K Kemp, naval archivist and a fellow member of the committee wrote in The Times "Meetings of the Ships Badges Committee with Sir Arthur present were always a delight, for his sense of humour was keen and contagious and his deep and intimate knowledge of heraldic matters was always freely at the disposal of those of us on the committee who fancied themselves as amateur kings of arms." Since then, the post has been held by an officer of the College of Arms. Cochrane took part in the coronation of King George VI in 1937 and was knighted that year. He also took part in the coronation of Queen Elizabeth II in 1953 and held the office of Clarenceux until his own death in 1954.