The study is on Electronic Information Resources Utilization among Physical Sciences Postgraduate Students in Federal University Libraries, South West, Nigeria. The research design used for this study is descriptive survey design. This is because it is a design that allows a population to be studied by collecting and analyzing data from only a sample considered to be representing the entire population. The area of the study is South Western zone of Nigeria. South Western geo political zone is made of Ondo, Osun, Oyo, Ogun and Lagos state respectively. The electronic resources are in raking order as institutional (university) website, computer, internet, computer connected to internet, photocopies, projector screen, printer, multimedia digital projector, functional email, telephone, floppy disk and others. It can therefore be concluded that electronic resources are integral part of library resources. Therefore, it should be acquired professionally and systematically. The resources need to be made accessible to the users for the goal of the library organisation to be achieved. It can therefore be recommended that users should acquire the skills needed for the purpose of utilizing the resources.