Background of the study: Coronoid process of mandible is a flat, triangular process,with variation in shapes like hooked, rounded and triangular.Anatomical variations in shape can result in narrowing of the vestibular space due to the close proximity of the medial aspect of the coronoid process to the distal molar tooth and cause impingement,resulting in restriction of mouth opening and mandibular hypomobility.This study was done to evaluate the presentation of different shapes of coronoid process of mandible in south indian population.As far as our knowledge goes this is frontier study in this region. Aim of the study: To determine the shape of coronoid process of mandible in south indian population. Material and methods: The present study was done in 125 dry human adult mandibles from the bone bank of Anatomy departments of Annapoorana medical College,Vinayaka Mission’s Kirupananda Variyar Medical College,Vinayaka Homeopathy Medical College, Salem.Variations in the shape of the coronoid processes like triangular,hook,rounded among right and left sides of the coronoid process in both the sex were observed and recorded. Results:Shapes of coronoid process observed were Triangular 60.8%,Rounded 14% and Hook in 25.6% in the present study.Hook shape was found Bilaterally in 28.8 %.In Edentulous bone Hook type of coronoid process was found in 53.3% and there was no incidence of rounded type bilaterally. Conclusion:Triangular shape of coronoid process is the most common presentation unilaterally and bilaterally.Incidence of Triangular,Rounded,Hook shape were found more in the in male mandibles compared to female mandibles.Unilateral Incidence of triangular and rounded coronoid shapes were more than bilateral incidence.Hook shape incidence(28.8%) was found more bilaterally.