Nyam-Osoryn Tuyaa (Mongolian: Ням-Осорын Туяa; born 1958) is a former Mongolian politician, and the acting Prime Minister from 22 to 30 July 1999.
[1] She also served as Chairperson of the 55th session of the United Nations Economic and Social Commission for Asia and the Pacific (ESCAP).
[2] Tuyaa was the foreign minister in the Democratic Party-led government under Janlavyn Narantsatsralt, being appointed in 1998.
When this government was forced to resign the following year, she became acting Prime Minister for a short time before parliament elected Rinchinnyamyn Amarjargal.
She then served as foreign minister in the new government until it was defeated in the 2000 elections.