Background: Psychiatric problems in children are rising and reported cases represent only the tip of the iceberg; large number remains unreported in India. There is limited data on childhood mental disorders and mental health needs in Northern-India. Aims and Objective: The main objective of this research was to study the extent and nature of psychiatric disorders in school children in a defined geographical area and to study their psychosocial correlates. Materials and Methods: In this cross sectional study, Childhood Psychopathology Measurement Schedule (CPMS) was used to measure the magnitude of 982 students in the age group of 10-15 years from four randomly selected schools in a city of North India. Screening stage was followed by detailed evaluation stage in which children were diagnosed by ICD-10 criteria. Statistical analysis was done by percentage and Chi-square test. Results: The results showed that among 982 students, 199 (20.2%) had psychiatric morbidity. Most of them were in the age group of 13-14 yrs, from middle income group and were second in birth order. No significant sexual preference was found regarding distribution of the disorders. Specific phobia; other non organic sleep disorders like sleep talking, bruxism; tension headache found to be the most prevalent disorders followed by sleep terror, hyperkinetic disorder, pica, enuresis. Conclusion: Epidemiological studies should be started early in childhood and carried longitudinally for development of preventive, promotional and curative programme in the community.