Introduction: Ovarian neoplasms are tumors or cancer of the ovary. These neoplasms can be benign or malignant and are classified according to the tissue of origin, such as the surface epithelium, the stromal endocrine cells, and the totipotent germ cells.Ovarian neoplasms are one of the major causes of gynaecological problems in females and present with marked variation in their histological types. Western and Asian countries show a difference in relative frequency of these lesions. This study was conducted to find out frequency of various histological patterns of ovarian neoplasms received as surgical pathology specimens at Histopathology department, Civil Hospital, Ahmedabad. Material and Methods: The study was conducted on 186 cases of ovarian neoplasms, reported from July 2016 to June 2017. 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 cystadenocarcinoma(3/16). Conclusion: Non-Neoplastic lesions were more common than neoplastic lesions, while benign tumours outnumbered the malignant ones. The most common benign tumour was serous cystadenoma and malignant was serous cystadenocarcinoma. The most common non-neoplastic lesion was Luteal cyst. Among histological types of ovarian tumours, surface epithelial tumours dominated the other types.