Thado Maha Thray Sithu U Kyin (25 April 1904 – 2006) was a Burmese civil servant and diplomat.
He joined the Indian Civil Service on 28 September 1928 and began his tenure as Burma's Assistant Commissioner in October 1928.
He became the Under-Secretary at Education Department in August 1932 and the Officiating Deputy Commissioner in October 1934.
In January 1939, he was promoted to Deputy Commissioner, and to Secretary of the Agriculture and Forests Department in February 1941.
He later went on to become the ambassador of the Union of Burma to the Republic of India (1951—1955), to the Court of St. James's or the UK (1955—1956) and to the USSR (1956—1962).