This study x-rays the impact of social networking sites utilization on academic performance of undergraduate students in Yobe State University Damaturu. Exploratory survey research design was used. Simple random sampling technique was used to select three hundred and seventy (370) students for the study. A self-developed Questionnaire was used to collect the data, the instrument was pilot tested and reliability of 0.76 was found. The data collected was analyzed using Mean and standard deviation (SD) for the research questions While Mann-Whitney was used to test the null hypothesis at 0.05 level of significance. The findings of the study revealed that social networking sites utilization has positive impact on academic performance of undergraduate students with cluster mean=2.634 and also the undergraduate students are competent in utilizing social networking site with cluster mean=2.580. Similarly, there is significant difference between male and female students (U (366) =691.5, P<0.05) of Yobe State University Damaturu in terms of social networking sites utilizations in favour of male students. The study recommends that the university should organized orientation programme and skill development to students that will encourage them to have the requisite skill, to be more competence and exposure to enable them to be more proficient in the utilization of SNSs in learning activities. The state government and university management should intensify their efforts and join hands together and ensure that computer laboratories are provided with adequate functional computers hardware and software for students’ to use. Seminars should be organized to students more especially female students’ on effective usage of Social Networking Sites.