The paper assessed social media obsession and associated deviant behaviour among youths in contemporary Nigerian society. Four research questions and corresponding hypotheses were answered and tested in the study. Survey research design was adopted in the study while the population comprised youths in Yenagoa Local Government Area out of which 383 youths were sampled using convenience sampling technique. The instrument used for data collection was a 15- item questionnaire titled “Social Media Obsession and Deviant Behaviour among Youths Questionnaire”.