Background: The aim of present study is to determine the volume of the mandibular condyle, coronoid process and mandibular body and it’s correlation with age and sex in malocclusions with the help of 3D Cone Beam Computed Tomography (CBCT) scans. Materials and Methods: 3D CBCT (Care stream 9000cc, USA) scans of 150 patients who had Class I, II, and III malocclusions were analyzed with Dolphin Imaging Software V11.9 to measure the volumes of mandibular condyle, coronoid process and mandibular body. Results: In the age group 14.1-18 years, the volume of condyle, coronoid process and body of mandible was noted to be highest. Among the malocclusions studied, the volumes of all 3 variables were maximum in Class I malocclusion. Mean coronoid volume and volume of body of mandible was noted to be higher in males than females while mean condylar volume was higher in females. Conclusions: 3D CBCT morphometry shows volumetric variations in mandible are related to age and type of occlusion. Mandible bone volume also shows sexual dimorphism.