The National Statistical Office of Thailand (NSO) (Thai: สำนักงานสถิติแห่งชาติ; RTGS: samnak ngan sathiti haeng chat) is the government of Thailand's official statistics surveyor.
In October 1935, the Division of Statistical Forecasting Compilation was moved under the jurisdiction of the Secretariat of the Cabinet, Office of the Prime Minister.
In May 1942, the division was reassigned to Department of Information under the Ministry of Commerce, but was moved back under the Secretariat of the Cabinet again in May 1943.
With increases in the need for and use of official statistics, in February 1950 the Division of Statistical Forecasting Compilation was reassigned to the National Economic Council (สภาเศรษฐกิจแห่งชาติ), which at that time had the status of a subministry (ทบวง), not under any ministry, in order to allow for equal access to statistics-gathering services by all offices of the government.
In December 1950, the division was expanded and renamed the Central Statistical Office (สำนักงานสถิติกลาง).
๒๔๙๕) laid out the expanded authority and duties of the Central Statistical Office.