This study investigated the factors for the development of electronic library in university libraries in Southern Nigeria. The study adopted a descriptive research design with a population of 107 which comprised all the systems librarians, electronic librarians and digital librarians in the federal, state and private universities in Southern Nigeria. An online questionnaire using Google form was the main tool for data collection with a total of 107 librarians who responded appropriately. The study revealed that ICT tools, information resources and facilities were used for the development of e-library in university. The findings also showed that there was a general consensus among the respondents concerning ICT tools and resources that were used for the development of e-library such as: CD-ROM, wireless network, and interactive board, office and electrical equipment, information resources (e-book, e-journal, e-newspaper) and subscription to databases. The findings further revealed that funding, authentication, digital preservation process, copyright issues, training, and ease of access were challenges affecting the development of e-library in Nigeria. The researchers therefore recommended that universities, colleges of education and polytechnics in Nigeria should endeavor to develop its e-library by considering the findings in order to achieve its mandate of delivering quality information services to the library patrons.