This study examined influence of social media on academic performance of secondary school’s students in Port Harcourt metropolis. Three objectives, three research questions and three hypotheses were raised to guide the study. Descriptive survey research design was used for the study. Population of the study consisted of 8,367 students. The sample of the study comprised 837 students (583 females and 254 males) representing 10 percent of the total population of the study. Instrument for data collection was a structured questionnaire constructed by the researchers. The instrument was validated by two experts in computer science and educational measurement and evaluation departments in Rivers State University. Split half method was used to establish the reliability cooefficeint of 0.84. To administer the questionnaire, 837 copies were distributed, and 805 were retrieved for analysis. Mean and standard deviation were used to answer the research questions while z-test was used to test the hypotheses at 0.05 level of significance. The analysis revealed that linked-in helps students in their studies as knowledge was being disseminated between among course mates. Linked-in as social media helped secondary school students to get immediate feedback from their lecturers. Based on the findings, it was recommended that Linked-in was a great tied to get students connected with people that can help them find information. Also, Facebook which seems to be the most popular social networks should be integrated into educational and pedagogical practices to promote learning.