Introduction: Globally, non-communicable diseases are increasingly recognized as a major cause of morbidity and mortality. Among them, overweight and obesity are imperative. The present changing dietary pattern among children is contributing to childhood over weight and on other hand stands as a risk factor in the development of dental caries among school children. Objective: To assess the nutritional status among the study population and to find out if there is any association between nutritional status and dental caries. Methods: A total of 200 school children who had completed chronological age of 12 years from selected middle school in Patna city constituted the study population. A pre-structured questionnaire was prepared to collect data regarding demographic details, oral hygiene practices, dentition status, treatment needs, and body mass index. Data obtained were statistically analyzed using Chi-square, analysis of variance (ANOVA). Results: There exists a significant association among children with normal BMI and mean DMFT among government and private school children. But no significant relation exists among other groups. No significant relationship among the gender with BMI. Conclusion: Thbmese complex and multifactorial relations like overweight and dental caries may involve many unknown factors which warrant exploration on larger population
