Rao Bahadur Sir Vangal Thiruvenkatachari Krishnamachari KCSI, KCIE (8 February 1881 – 14 February 1964) was an Indian civil servant and administrator. He served as the Diwan of Baroda from 1927 to 1944, Prime Minister of Jaipur State from 1946 to 1949 and as a member of the Rajya Sabha from 1961 to 1964.