The aim of this research is to examine the relationship between university students' perceived social support, internet addiction levels and social media addiction levels. The research was carried out with the relational survey method, one of the quantitative research methods. The study group of the research consists of 304 university students. In the study, the "Multidimensional Perceived Social Support Scale" was used to determine the perceived social support level of university students, the "Internet Addiction Scale" to determine their internet addiction level, and the "Social Media Addiction Scale" to determine their social media addiction level. In the analysis of the data, t-test, Pearson correlation analysis and multiple regression analyzes were performed. As a result of the research, there was a negative significant relationship at the level of .24 between the university students' perceived multidimensional social support scores and their internet addiction levels, while a negative significant correlation was found at the .27 level between multidimensional perceived social support scores and their social media addiction levels. In addition, a significant positive correlation of .75 was found between internet addiction levels and social media addiction levels. Regression analysis was applied in line with the data obtained and it was seen that internet addiction levels and social media addiction levels in university students explained 7% of multidimensional perceived social support. The data obtained from the research were discussed in the light of the literature.