Background: The prevalence of dental caries is high across Saudi Arabia and varied by geographic location. There are very few studies done to assess the prevalence rate of dental caries in Buraydah city. Aim: To determine the prevalence of dental caries among the girl students of primary school in Buraydah, Saudi Arabia Methods: Cross sectional study was done among the girl students of primary school in Buraydah City in the age group of 7-9yrs. The subjects werefrom 3 randomly selectedschools. Sample size was 401. Dentition status was assessed using dft Index for primary teeth and DMFT Index for permanent dentition. Results: The collected data were analysed with IBM. SPSS statistics software 23.0 Version. For the multivariate analysis the Kruskal Walli__ampersandsignrsquo;s test was used. To find the significance in categorical data Chi-Square test was used. Among the 401 study subjects, caries prevalence was found to be 80.80% in primary teeth and 29% in permanent teeth. Conclusion: The present study reported a high prevalence of dental caries in primary dentition thanpermanent dentition. This implies an urgent need for awareness initiative for preventive dental health behavior and attitudes, which is beneficial for the lifetime.