The study investigated librarians’ motivation as correlates of job performance in University libraries in South-South Nigeria. The main objective of the study was to determine the relationship between librarians’ motivation and their job performance. The study adopted correlational research design. The population of the study comprised 170 librarians employed in federal and state university libraries in South-South, Nigeria. The entire population was studied due to the relatively small size of the population. Two research questions and one hypothesis were formulated to guide the study. Questionnaire was used to elicited data from the respondents. Inferential statistics were used to analyse the data elicited from the respondents. The findings revealed that positive relationship existed between librarians’ motivation and job performance in the South-South, Nigeria. And the relationship is significant. Based on the findings some recommendations were made.