This study examined motivation and job satisfaction as correlates of job performance of library staff in Landmark University, Omu-Aran, Kwara State. Descriptive survey research design was adopted and the entire 25 library staff constituted the population and sample of the study. Questionnaire was used to collect data from the 25 staff, out of which 23 copies of the questionnaire were completely filled and returned. Frequency counts and percentages were used to analyze the data collected to answer the six research questions while Product Moment Correlation Coefficient (PPMC) and multiple regression analysis were used to test the null hypotheses of the study. The study revealed that the level of job performance of the respondent is high; that appreciation, promotion, financial incentives, among others are the major motivational factors that influence job performance of the respondents while salary structure, job security, relationship with co-workers, institution’s policies, and work itself are the factors that determine the job satisfaction of the respondents; that motivation and job satisfaction influence the job performance of the respondents to a great extent while inadequate funds to support career development programme of the staff, insufficient technological skills, and lack of proper motivation from the superior are the major barriers to the effective performance of the respondents. The results of the tested hypotheses revealed that motivation and job satisfaction jointly influence the job performance of the respondents. The study recommends that library management should ensure that staff are constantly motivated and satisfied with their jobs which will in turn enable them to improve their performance and organizational productivity; library management in conjunction with the university management should provide enough fund to support career development programmes of the staff.