To assess the prevalence of deleterious oral habits in school going children. Materials & methods: The study included 150 children of age 10 to 12 years. Out of 150 children, 85 were males and 65 were females. Children were examined on an upright chair using mouth mirror and straight probe. Prevalence rates of different oral habits studied were calculated. Result: Age wise prevalence of oral habits as 10 years old showed 10%, 11 years have 16% rate and 12 years of age have 6% of prevalence rate. The result showed that 20% children had a habit of tongue thrusting, 18% mouth breathing and 6.4% nail biting. Conclusion: The distribution of children aged 10 to 12 years having oral habits was evaluated with tongue thrusting being most prevalent.