Background:-Both qualitative and quantitative methods of recording malocclusions are important for epidemiologists and for planning the provision of orthodontic treatment for a definite population. Several quantitative systems have been used to measure the severity of treatment need etc with the help of indices. Occlusal index (OI) and index of orthodontic treatment need (IOTN) are advantageous as they are simple and accurate for measuring malocclusion for a given population. Aim:- To assess the objective and subjective levels of severity and orthodontic treatment need in Haldia population using Occlusal and IOTN indices. Materials and method:- A total of 200 patients, more than thirteen years of age, from the out-patient department of Orthodontics and Dentofacial orthopaedics, Haldia Institute of Dental Sciences and Research, Haldia were included in the present study for orthodontic treatment. All the subjects were made to sit on a dental chair and frontofacial intraoral photographs were taken with relaxed perioral musculature, and impressions were made with alginate impression material. Ocllusal index (OI) and index of orthodontic treatment need (IOTN) were applied to assess the findings.  Results:-OI classification showed Good occlusions 7.5%, No treatments 17.5%, Minor treatment 45.0%, Definite treatment 27.0% and Worst occlusions 3.0%. IOTN-DHC index showed the findings to be None of 8.2%, Little treatment 22.9%, Moderate 47.5, Great treatment 56.55% and Very great 27.0%.  The Aesthetic Component (AC) with gender with requirements based on AC score showed Little or No treatment in 30.0 % cases, Moderate and Border line treatment in 63.5% and Treatment required was for 11.0%. cases. Spearman’s rho Correlations with OI, DHC and AC showed high association at 5% level of significance. Cohen’s Kappa statistic for Inter rater agreement reliability and highly statistically significance at 5 % level. Conclusion:- The study recognized a dependable baseline information in terms of frequency, distribution and severity of malocclusion to answer the treatment requirements within the local population.