This study assesses students' use of library and reading comprehension performance among selected colleges in Kaduna metropolis. The population for the study from the two colleges slated in respect of the study was 1,304. A total proportional sample of 391 was used for the study. The instruments adopted for this study included questionnaires, observations and a reading profile register. The hypotheses of the research were tested via well-structured questionnaires that were served on the students and a reading profile register to determine the frequency of their visits to the library, to observe the type of materials or text they read and how such impacted on their performance. The instruments of this study were assessed on their face validity under the strict guidance of an expert. To determine the reliability, KR2 formula was used to calculate the reliability estimate, which yielded a reliability coefficient of 0.72. The data collected were analyzed in relation to their performance in a recent examination under reading comprehension. Two hypotheses were accepted, which implied that frequent, as well as occasional visits to the library for free extensive reading enhance reading comprehension performance. The third hypothesis showed that non-visit to the library for free extensive reading had a negative effect on the students' comprehension performance. This hypothesis was therefore rejected. The major findings in this study showed that non-visits to the library for free extensive reading had a negative effect on the students' comprehension performance. This hypothesis was therefore rejected. The major findings in this study showed that, effective patronage of the library for extensive reading had the potential of developing and enhancing comprehension performance of students. Negative attitudes towards use of library, on the other hand, inhabited performance. There was therefore a dire need to re-equip, enrich and improve college libraries with modern facilities for better service delivery. Orientation campaign effort should also be mounted for the benefit of the students toward the value and importance of the use of the college libraries. Teachers should as well encourage students through assignments to patronize such libraries so as to derive maximum benefit from them which could enrich their schemata to confront varied reading comprehension texts with ease.