This meta-analysis study aimed to examine the effect of data literacy education, which affects databased decision processes, on data use knowledge and skills of school administrators and teachers. Therefore, theses on data literacy education for school administrators and teachers and relevant studies in peer-reviewed journals were examined through several databases. The study was conducted using the Comprehensive Meta-Analysis (CMA) software, using a total of eight studies published between 2006-2021. The results revealed that the selected studies were heterogeneous. Therefore, a random effects model was applied in the study. The overall effect size value of data literacy education was calculated as 2.16 according to Cohen d, suggesting that data literacy education makes a positive contribution to data use knowledge and skills of school administrators and teachers. The subgroup analyses conducted to determine the source of heterogeneity in results have shown that data literacy education did not differ by the type or the country of publications but varied by the type of participants, where studies conducted with mixed participants had high effect values.