This study was conducted to determine the influence of school library utilization on the performance of secondary school student in Abuja FCT. Two research questions and one hypothesis were formulated to guide the study. Descriptive survey research design was used for the study. The population of the study was all 16362 students in public secondary schools in Abuja Metropolis. A sample of 579 students was selected to take part in the study using simple random sampling technique. An instrument entitled “Utilization of School Library and Students’ Academic Achievement Questionnaire (USLSAAQ)” was used in collecting data for the study. The instrument was validated by three experts and test re-test reliability was conducted for the instrument. A reliability coefficient of .81 was obtained for the instrument using Pearson Product Moment Correlation. Data collected for the study were analysed using mean and standard deviation to answer the research questions and independent t-test to test the hypothesis. The findings of the study indicated that there is a significant influence of library utilization on academic achievement of students in Abuja Metropolis. It was recommended among others that government should provide all secondary schools in Abuja metropolis with modern and functional libraries.