This study was conducted to investigate the difference of the Impacts of social media on mental health and aggression. The main purpose of this research is to increase knowledge of the relationship between social media users and mental health, social media users and aggression, and highlight the need for psychosocial support for Social Media users. A total of 120 samples of social media users were taken from Surat City in Gujarat. Their samples were taken along with the data collected with the help of ‘Mental Health Inventory’ this scale was constructed by A. K. Shree Vastav and Dr. Jagdish (1982). and ‘Aggression Scale’ this scale constructed by Jansari, A. (2021). The data was used to obtain the Mental Health and Aggression measurement of the subjects. The collected data was statistically analyzed with the help of ANOVA and ‘r’ test. The results show that there is not significant difference in mental health between girls and boys using social media. (F = 3.43). There is significant difference in mental health between using less than 2 hours and more than 2 hours social media users. (F = 66.01). There is significant difference in mental health between gender and use of duration in the social media users. (F = 12.69). There is significant difference in aggression between girls and boys using social media. (F = 45.69). There is significant difference in aggression between less than 2 hours and more than 2 hours social media users. (F = 183.96). There is not significant difference in aggression between gender and use of duration in the social media users. (F = 2.13). There is significant correlation between mental health and aggression in girl using social media. (r = 0.53). There is significant correlation between mental health and aggression in boy using social media. (r = 0.83). There is not significant correlation between mental health and aggression in using less than 2 hours social media users. (r = 0.07). There is significant correlation between mental health and aggression in using more than 2 hours social media users. (r = 0.42). There is significant correlation between mental health and aggression in over all social media users. (r = 0.58)