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Context : D0 ental caries is the most common oral disease that affects significant number of Indian population. The prevalence of caries in India is reported 31.5% to 89%. Aims : T0 his study was aimed to estimate the prevalence of dental caries and treatment needs in school going children of Delhi. Materials and Methods : A0 school based cross-sectional study was conducted in various educational zones of Delhi. A total of 520 school children in age range of 9-12 years were examined using WHO (1997) criteria. Statistical Analysis Used : C0 hi-square test. Results : T0 he prevalence of dental caries was found to be 52.3% with mean deft and DMFT of 0.5038 ± 1.0859 and 0.8250 ± 1.3437, respectively. Besides various treatment needs 49.7% required restorative treatment. Conclusion : T0 he prevalence of dental caries in Delhi school children is high with D+d components comprising of more than 95%. This indicates lack of awareness and affordability to the dental facilities available. Therefore, there is a need to develop preventive and promotional oral health strategies to combat this infectious disease.