By 1949, there were four major fields of study: Law, Commerce and Accountancy, Political Science and Diplomacy, and Economics. In 1952, the name was changed to Thammasat University.

Thammasat University marked a milestone in university education in Thailand by introducing liberal arts education with the founding of the Faculty of Liberal Arts in 1962. Since then, liberal arts education has spread to all universities in Thailand, providing what is called foundation core-courses for all undergraduates. The Faculty of Liberal Arts has grown into several major fields including the following disciplines: Chinese, Drama, English as a Second Language, English Language and Literature, Geography and Natural Science, German, History, Japanese, Library Science, Linguistics, Mathematics, Philosophy, Psychology, Russian, Statistics and Thai. In 1984, the Department of Sociology was upgraded to become the Faculty of Sociology and Anthropology and the Department of Journalism became the Faculty of Journalism and Mass Communication.

• Department of Mechanical Engineering, Thammasat University
• Faculty of Science and Technology, Thammasat University