1) The study assessed the perceived effects of Facebook usage on the academic activities of 80 agricultural students at the University of Port Harcourt in Nigeria. 2) It found that the most frequently used social media by students were Facebook (94%), Blackberry Messenger (90%), and WhatsApp (72.5%). Most students visited Facebook once every 3 days and spent 1 hour or less on the site daily, mainly for chatting. 3) Students agreed that Facebook had positive effects by facilitating networking with other agricultural students, encouraging collaboration, and easing information flow. However, it was also found to distract students from academic assignments. The overall rating showed Facebook had a positive effect on students' academic activities.