This is a data file used in a meta-analysis. This meta-analysis quantified the relationship between the five-factor model of personality and social media addiction and identified moderators of this relationship. The analysis included 32 studies and 34 independent samples, with a total of 19,668 participants. The meta-analysis found that high neuroticism (r = .19, p < .001), low conscientiousness (r = -.13, p < .001), low agreeableness (r = -.05, p = .03), and low openness (r = -.06, p = .02) were significantly associated with social media addiction. Several significant moderator effects were found involving age and sex, with females and younger individuals generally showing stronger associations between certain personality traits and social media addiction. The meta-analysis contributes to the understanding of the relationship between individual characteristics and social media addiction and provides information that might be useful in preventing and treating this addictive behaviour.