Ammar Siamwalla (Thai: อัมมาร์ สยามวาลา; RTGS: Amma Sayamwala) is one of Thailand's most prominent economists.

[2] Siamwalla attended St. Paul's School, Darjeeling in India, and went on to receive a B.Sc.

His teachers at Harvard included Alexander Gerschenkron, Wassily Leontief and Edward Chamberlin.

[citation needed] He began his career as an assistant professor and research staff economist at the Department of Economics, Yale University before moving to the Faculty of Economics of Thammasat University as a Rockefeller scholar at the advice of Puey Ungpakorn who was then dean of faculty.

[4] Currently, he holds a post as a distinguished scholar of Thailand Development Research Institute.