Introduction: Ovarian malignancy represents 5th most common cause of cancer death in females and they account for 2nd leading cause of death from cancer of the female genital tract. Though they are treatable and sensitive to anticancer therapies, they are usually detected when they have spread beyond the ovary. Objective: To know the overall incidence of malignant ovarian tumours among all ovarian tumours. To report the age incidence, presentation, gross and microscopic features of various histomorphological types of malignant ovarian tumours which help the clinician in the anticipation of malignancy before its spread beyond the ovary. Methods: This is a clinicopathological retrospective study where clinical details of all ovarian tumours which were diagnosed as malignant were obtained. The regressed bits were subjected to histopathology processing and staining. Results: In our study, we noted overall malignancy was14.70% among all ovarian tumours. Most commonly seen in the age group of 51-60 years and most commonly presented with either lump or pain in the abdomen. Grossly they are solid and 95.5 % are primary in origin. Among the primary ovarian malignant tumours, 69% were surface epithelial tumours. Conclusion: The solid component in an ovarian tumour may represent the malignant nature of tumour with the increasing age of women. Surface epithelial malignancy was more common in the old age and germ cell tumours were seen in the younger group. Preoperative diagnosis of malignant tumours can be done by radiological, serological and clinicopathological findings which help in the reduction of mortality.