This paper examines the role of Nigerian private university libraries in supporting research. The case study approach was used for the study and a questionnaire was used to collect data from 120 respondents. Data were analyzed using percentage and graphical analysis. The major findings are that: research impacts positively on community development, research output impacts the recognition and ranking of universities, the library impacts positively on research, and library ICT impacts on the quality of research. It was recommended that the university budgeting authority allocate at least 10 percent of its annual budget to the library as recommended by the National Universities Commission. A state-of-emergency should be declared on library Internet connectivity and computerization projects. Researchers should put the library to effective use, and concentrate their research on topics that can be applied to solve problems. University authorities should make research grants available to researchers carrying out investigation in the university's areas of interest.