This study examined the influence of social networking on academic performance of secondary school students in Kaduna Metropolis, Nigeria. The study was guided by four research questions and four null hypotheses that were tested at 0.05 level of significance. Expost-facto research design was used in this study. The population of the study consisted of 1904 SS II Students in Kaduna Metropolis. The study has a sample of 190, a purposive sampling technique was used in selecting the sample of the study. Two instruments were used for data collection Extent of Social Networking Questionnaire (ESNQ) and Academic Performance Test (APT) in English Language and Mathematics. Null hypotheses 1 & 2 were tested using the Pearson Product moment Correlation (r) to determine the influence while null hypotheses 3 and 4 were tested using Independent t- test. Results of the findings showed significant influenced of Facebook usages on academic performance of secondary school students. The study also found significant influence of WhatsApp usages on academic performance of secondary school students. This implies that WhatsApp usage had negative influence on academic performance, the higher the level of WhatsApp usage, the lower the academic performance. The results showed that there is significant differential influence of Facebook usage on academic performance of male and female secondary school students. This shows that the female Facebook student?s users were more negatively influenced than their male counterparts. The study also revealed that there is no significant differential Influence of WhatsApp usage on academic performance of male and female secondary school students. It was recommended among others that Secondary School Students should make appropriate use of Facebook and WhatsApp to enhance their academic performance instead of chatting with friends.