National Statistical Service of Republic of Armenia (Armenian: Ազգային վիճակագրական ծառայություն, NSS; ARMSTAT) is the national statistical agency of Armenia.
The statistical institution started its main activity from January 7, 1922 and was called Statistical Department of Soviet Socialist Republic of Armenia. It was also previously known as:
- Ministry of Statistics, State Register and Analysis of the Republic of Armenia (April 1998-May 2000),
- State Department of Statistics, State Register and Analysis of the Republic of Armenia (1992-1998),
- State Statistical Committee of the Soviet Socialist Republic of Armenia (1987-1992).
Armenia joined the International Monetary Fund's Special Data Dissemination Standard on 7 November 2003, being the third from the Commonwealth of Independent States to become a member. From the 1 January 2009, Armenia was a member of the United Nations Statistical Commission until the end of 2012.