Johannes Baptista Sumarlin (7 December 1932 – 6 February 2020) was an Indonesian economist who served as Minister of Finance. Sometimes linked with the so-called Berkeley Mafia group of economic advisers which included senior Indonesian economists such as Widjojo Nitisastro, Emil Salim and Ali Wardhana, Sumarlin held various important economics posts in the Indonesian government for many years until the late 1990s. He graduated from the Faculty of Economics, University of Indonesia (FEUI) in 1958. Positions held in government included, among others, Chairman of Supreme Audit Agency, Minister of Finance, Chairman of the National Planning Agency (Bappenas), and Minister for Administrative and Bureaucratic Reform.