Introduction: Ovarian tumours are one of the major causes of gynaecological problems in females and present marked variation in their histological types. Relative frequency of these lesions is different for Western and Asian countries. This study was designed to find out frequency of various histological patterns of ovarian tumours in patients attending Pathology Department of Tertiary care Hospital. Material and Methods: A retrospective case __ampersandsignndash; series study was conducted on 186 cases of ovarian masses, reported from august 2013 to July 2014. Results: Mean age of the subjects was 35.6 years, ranging from 4 to 80 years. In a total of 186 cases of ovarian masses, 104(55.91%) were non-neoplastic and 82 (44.09%) were neoplastic. Among neoplastic lesions, 80.48% (66/82) were benign and 19.52% (16/82) were malignant. The commonest non-neoplastic lesion was Luteal cyst (43/104) followed by simple serous cyst (25/104). The commonest benign tumor was serous cystadenoma(40/66) followed by dermoid cyst(12/66). The commonest malignant tumour was serous cystadenocarcinoma (5/16) followed by mucinous cystadenocarcinomama (3/16). Conclusion: Non-Neoplastic lesions were more common than neoplastic lesions, while benign tumours outnumbered the malignant ones. The commonest benign tumour was serous cystadenoma and malignant was serous cystadenocarcinoma. The commonest non-neoplastic lesion was Luteal cyst. Among histological types of ovarian tumours, surface epithelial tumours dominated the other types.