Leonard Petrosyan (Armenian: ??????? ?????????; 13 October 1953 – 27 October 1999) was the second President of the Nagorno-Karabakh Republic for almost 6 months (20 March 1997 to 8 September 1997).
He also served as Prime Minister of the Nagorno-Karabakh Republic from December 1994 to June 1998.
He was killed in the 1999 Armenian parliament shooting while serving as Deputy Prime Minister of Armenia.