This study examined and found ICT tools for marketing library services within selected university libraries in Oyo State, Nigeria; University of Ibadan, Ladoke Akintola University of Technology Ogbomoso, and Ajayi Crowther Oyo. One hundred twenty (120) questionnaires were distributed for administration but only one hundred and ten (110) questionnaires were returned; representing 91.7%, and were found useful for this study. The statistical Package for Social Sciences (SPSS) was used to analyze the returned questionnaires. The data was analyzed using frequency tables, simple percentages, and a chi-square test for dependent and independent variables. The study discovered that internet facilities, videoconferencing, email, social media, telephone, OPAC and websites were available for marketing library services, with radio and television having lowest availability. Reservation, renewal, current awareness and online access to library database were library services rendered which accounted for the highest percentage of respondents. The findings also show that marketing library services helps promote the library profession. However, with all the benefits inherent in having market library services, there are still a lot of problems militating against developing good market strategies in the library, such as inadequate funding and poor infrastructure (ICT tools). In order to achieve effective and efficient marketing of library services, adequate attention must be given to the strategies and recommendations given in the study.