Lieutenant-Colonel Sir George James Cullum Welch, 1st Baronet, OBE, MC (20 October 1895 - 28 July 1980), commonly known as Sir Cullum Welch, was a British Army officer, businessman and member of the City of London Corporation, who served as Lord Mayor of London between 1956 and 1957. He married Gertrude Evelyn Sladin Harrison, daughter of John William Harrison, on 23 April 1921, and together they had two children. He married his second wife Irene Avril (died 2 March 1996), daughter of John Foster OBE on 25 February 1969. Welch was succeeded in his title by his only son.