The relationship between narcissism and social media use has been a topic of study since the advent of the first social media websites. In the present manuscript, the authors review the literature published to date on the topic and outline 2 potential models to explain the pattern of findings. Data from 62 samples of published and unpublished research (N = 13,430) are meta-analyzed with respect to the relationships between grandiose and vulnerable narcissism and (a) time spent on social media, (b) frequency of status updates/tweets on social media, (c) number of friends/followers on social media, and (d) frequency of posting pictures of self or selfies on social media. Findings suggest that grandiose narcissism is positively related to all 4 indices (rs = .11–.20), although culture and social media platform significantly moderated the results. Vulnerable narcissism was not significantly related to social media use (rs = .05–.42), although smaller samples make these effects less certain. Limitations of the current literature and recommendations for future research are discussed.