The Department of Mathematics is one of the long established departments of Ramanujan College. Earlier, B. A. Programme Mathematics and few courses (Business Statistics and Business Mathematics) of B. Com (H) were handled by the Department of Mathematics. In the academic session 2013-14, the Department of Mathematics offered honours course in Mathematics under the FYUP scheme of courses which  was later re-framed into three year undergraduate course. Since 2016, the Department is admitting students in B.Sc. (H) Mathematics under the Choice based credit system (CBCS).  Apart from honours course, the Department also offers Mathematics as a Discipline Course in BA Programme.

The Department aims to create a solid foundation for the assimilation of mathematical concepts and structures and build mathematical skills like creative, logical and analytical thinking. Software such as Mathematica is used to increase the understanding of the fundamental mathematical concepts. It has a vibrant Society – RamanuGen that promotes student’s interests in the subject by organizing activities with their enthusiastic involvement.

The Department has 8 faculty members with their research interests lying in Algebra, Graph Theory, Complex Analysis, Operator Theory and Applied Mathematics. The faculty is research-oriented has been publishing research articles in peer reviewed national and international journals. Faculty members have also presented their work on international platform as well.