Sudjadnan Parnohadiningrat (born 21 October 1952) is a former Indonesian diplomat. He served as an official in the Indonesian Department of Foreign Affairs for over two decades. Sudjadnan had held several high-profile positions, including Secretary General of the Ministry of Foreign Affairs (2002 to 2006), Ambassador of Indonesia to Australia (2001–2002) and Ambassador to the United States (2006–2009).