social media addiction is a rising problem that affects Egyptian university students physically, psychologically, socially, and mentally. It is considered a subtype of Internet addiction, specifically involving checking, and updating behavior. This behavior can become obsessive and affect one's well-being and overall quality of life. Aim of the study: Explore social media addiction among Zagazig university students. Subjects and Methods: Research design: A cross-sectional analytical research design was carried out in this study Setting: The present study was conducted at nursing, pharmacy, education, and commerce colleges at Zagazig University. Subjects: A stratified multi-stage random sample was selected from the four colleges (n= 480). Tool of data collection: two tools were used for collecting data. Tool (I): self-administered questionnaire. Tool (II): Social Media Addiction Scale - Student Form (SMAS-SF). Results: More than two fifths of the study sample (44.2%) was characterized by high total social media addiction. The descending order of high social media addiction among students was virtual tolerance (67.1%), then information (64.6%). The highest negative effects mentioned were headache (68.3%), then visual problems (60.8%). Social media addiction had statistically significant negative correlation with students age (r=-.134), school year (r=-.150), and GPA (r=-.185). Conclusion: More than two fifths of the study sample was characterized by high total social media addiction. Recommendation: conducting Preventive programs to help students raise social awareness in relation to social media use and addiction among university students, Future research to study factors affecting social media addiction, and replicate the study on a large scale and in other settings to permit for generalization of results.