The Thailand Development Research Institute (TDRI – Thai: สถาบันวิจัยเพื่อการพัฒนาประเทศไทย) is a non-profit non-government Thai policy think tank focused on social and economic development issues based in Bangkok, Thailand.

[4][5][6] TDRI was established by the initiative of the National Economic and Social Development Board as a public policy research institute in 1984 with the intention of creating a research agency that is independent from the government and bureaucracy.

Thai Prime Minister General Prem Tinsulanonda and Prime Minister Pierre Trudeau of Canada therefore signed an agreement to provide assistance granting funds through the Canadian International Development Agency to establish the institution.

In addition, the United States Agency for International Development also provided funding for the establishment along with other private companies such as Mitsui Group and Unocal Corporation.

Its current income is mostly derived from government contracts and funding from international organizations.