The National Archives of Thailand (NAT) (Thai: สำนักหอจดหมายเหตุแห่งชาติ; RTGS: samnak ho chot mai het haeng chat ) is a Thai government agency under the Fine Arts Department of the Ministry of Culture. It was established in 1916 (B.E.2459) as a section of the National Library of Thailand. It officially became the National Archives of Thailand on 18 August 1952. The NAT employs 131 persons and has an annual budget of 80 million baht. It has satellite facilities in Phayao and Ubon Ratchathani Provinces. As of 2018 the NAT Director is Ms Nanthaka Pollachai.