The Department of Mathematics, Faculty of Science, Mahidol University was established in 1989 and initially offered undergraduate programs in Mathematics and a master’s program in Applied Mathematics under the leadership of Assoc. Prof. Nardtida Tumrasvin, the first Head of the Department; during its early years, the Department expanded its academic staff and encouraged further study abroad to enhance teaching quality to international standards, and it now offers five major fields of study—Pure Mathematics, Applied Mathematics, Statistical Mathematics, Computational Mathematics, and Actuarial Mathematics—with continuous curriculum development at both undergraduate and graduate levels to keep pace with scientific and technological advances; in the same year of its establishment, the Department founded the Mathematics Research Center with support from the University, Thai Oil Public Company Limited, and Victory Granite Company Limited to promote internationally recognized research, particularly in nonlinear systems in biology and medicine as well as mathematical modeling; in 1999, the Ph.D. program in Mathematics was launched, completing degree offerings at the bachelor’s, master’s, and doctoral levels, and in 2008 the Department was assigned as the core institution of the Center of Excellence in Mathematics under the Office of Advanced Education and Research in Science and Technology, a collaborative network of 19 public universities. At present, the Department has more than 38 Thai and international academic staff members teaching in both regular and international programs and providing fundamental mathematics courses for students across the University.