Problematic social media use consists of use that interferes with individuals' functioning, such as for example in failing to complete important tasks. A number of studies have investigated the association of trait mindfulness with problematic social media use. This meta-analysis synthesised research from 14 studies and a total of 5355 participants to examine the association between mindfulness and problematic social media use across studies. A lower level of mindfulness was associated with more problematic social media use, with a weighted effect size of r = -.37, 95% CI [-.42, -.33], k = 14, p < .001.