The Department of Mathematical Sciences, Olabisi Onabanjo University was founded in 1982. It has the responsibility for the provisions of training needs, and services in Mathematics, Statistics and Computer Science.
The Mathematics and Statistics programmes were the first to start. Other programmes commenced later which included Computer Science and combination of Mathematics with Computer Science and Statistics.So also Computer Science with combination of any of the following namely Economics, Business Administration and Accounting.
The programmes were five-year duration which involved four years of instructions and one year for industrial attachment.
A one-year Diploma Programme in Data Processing was also started in 1985 to meet the middle level manpower needs of Computer installations in Industry and Government.The Department had so far offered degrees in Computer Science, Mathematics and Statistics.
In 1995, Diploma in Data processing (DDP) was extended to involve part-time students and also introduced is a one year Diploma in Computer Studies (DCS) meant for professionals in the Computer industry.
Currently, the combined honours degree programmeswith social/management courses are gradually being phased out and replaced with single honoursProgrammes in Mathematics, Statistics and Computer Science only with five-year Computer Science degree programmehas also been replaced with a four-year programme as depicted in the student hand book prepared by the department.
The list below shows the names of past Head of Department from 1982 – till date

Prof. R.F.A.Abiodun (Coordinator) 1982 – 1989

Dr. O. Otolorin 1989 – 1991

Prof. B. O. Balogun (Late) 1991 – 1992

Mr. J. A. Ayanjimi (Late) 1992 – 1994

Dr. M.O. Oyesanya 1996

Dr. O. Otolorin 1996 – 1998

Dr. M.O. Oyesanya 1998 – 1999

Prof. O. Otolorin 1999 – 2001

Dr. A. W. Gbolagade 2001 – 2005

Prof. J. O. Iyaniwura 2005 – 2009

Dr. M.A. Usman 2009 – 2014

Dr. D.A. Agunbiade 2014 – 2016

Dr. T.O. Olatayo 2016 – 2018

Dr O. S. Odetunde 2018 – till date

The philosophy that guides the training of students in this department is the production of skilled manpower that is adequately furnished with the comprehensive information technological development in an environment characterized by scarcely qualified Mathematics, Statistics and Computer science teachers (relative to the growing population), vast and rapidly increasing materials resources but with very weak data production and information management system.

Such knowledgeable professional manpower has to be produced in an atmosphere with qualified and competent human and appropriate material resourced in an atmosphere with qualified and competent human and appropriate material resources using effective techniques of instruction. Consequently, the department provides opportunities for the training, for the acquisition of basic and later higher degrees in the Mathematical Sciences.

The training programmes are mounted through classroom theoretical and tutorial instruction, laboratory practical and industrial work experiences.