The purpose of this study is to develop a valid and reliable scale to determine and evaluate the different dimensions of data literacy at school. The study is a quantitative descriptive survey model. The sampling for exploratory factor analysis was formed of 307 and confirmatory factor analysis 338 teachers and school administrators who are on active duty in 2023-2024 educational year in Kastamonu. Data was collected through a five item likert data collection tool. A three-dimension structure was formed and it was confirmed by CFA. The dimensions of data culture at school are; "data identification", "data use" and "data management". Internal reliability and validity was verified through Cronbach Alpha (Cronbach's [alpha]=0.882), split half method (r=0.837), Spearman-Brown correlation coefficient (R=0.911) and Guttman's lambda ([lambda]=0.904). The external reliability and validity was verified by test-retest technique (first application n=44, second application n=39, r=0.800, p[less than or equal to]0.05, R=0.961, p[less than or equal to]0.05, and Kendal's tau-b is [tau]b=0.904, p[less than or equal to]0.05). The findings confirmed the validity and reliability of the scale.