Collection development in any academic library is an on-going process. It is undertaken by librarians and library services staff with inputs from different stakeholders, including the academic and nonacademic staff, administrators, and students. The main objective of this paper is to assess the involvement of library users in collection development of hybrid academic libraries in Tanzania. A triangulation approach for data gathering was adopted. Structured and standardized self-administered questionnaires were used to collect data from 82 respondents who were randomly selected from a population of 301 library professionals and academic staff. Key informant interviews were conducted with four library directors and four ministers of education for students' organisations to complement the data obtained through the questionnaires. The findings of this study indicate that library users lack information literacy skills and they are rarely involved in selection, evaluation and weeding of library information resources. Based on this ground, it is recommended that academic libraries should establish an academia forum within a library website for sharing information with the academic departments and information users in general in respect to library collection development. Additionally, users should be provided with annual evaluation and weeding forms to comment on quality and usefulness of the resources and data sources available in their respective areas of study and suggest for amendments where necessary.