The study was carried out to investigate the quality information resources and its impact on academic performance of students in tertiary institutions in Niger State. The objectives of the study were to ascertain the availability of information resources, find out the impact of the quality of information resources on students’ academic performance among others. Three research questions were formulated, and one null hypothesis was tested at 0.05 level of significance. The study adopted survey research design. The population of the study comprised of undergraduate students of the tertiary institutions in Niger State which as at 2014/2015 academic session was 69,061. Multistage sampling technique was used to sample 373 respondents. Questionnaire was used for data collection. A total 373 copies of the questionnaire were administered out of which 326 copies were dully filled and returned correctly representing 87% response rate. Mean (x) was used to analyze data in respect of the three research questions formulated. The findings from the study revealed that most of the information resources were not available in the academic libraries. Other findings revealed that quality of information resources and its utilization has positive impact on the academic performance of undergraduate students. The hypotheses tested showed significant relationship between quality of information resources, and students’ academic performance in tertiary institutions in Niger State. Drawn from the findings, it was recommended that libraries in tertiary institutions in Niger State should be adequately equipped with quality information resources among others.