Due to the high incidence of surgical castration of bitches at an early age, uterine tumors are a rare diagnosis. They appear in middle-aged and older bitches, usually between five and twelve years of age. Uterine tumors can be benign, which have a good prognosis, and malignant, which have a worse prognosis if they metastasize and affect the surrounding lymph nodes. In this thesis, the goal was to determine the characteristics of tumors with regard to the breed, age and body weight of bitches admitted to the Obstetrics and Reproduction Clinic. In the research, the histopathological examination data for a total of 14 bitches in the period from 2011 to 2021 were analyzed. The average age of bitches on the day of uterine tumor diagnosis was 11 years for crossbreeds, and 9 years for purebreds. In purebred breeds, 23.08% of leiomyomas, 23.08% of fibromas and 15.38% of endometrial polyps were recorded. In crossbreds, 23.08% of leiomyomas, 7.69% of endometrial polyps and 7.69% of adenocarcinomas were recorded. The average age of bitches according to the type of neoplasia for leiomyoma and fibroma was 9 years, for endometrial polyp 11 years, and for adenocarcinoma 14 years. The most common clinical signs noticed by owners are chronic abdominal enlargement and vaginal discharge of different color and consistency. Diagnosis of uterine tumors includes radiography, ultrasound examination, laparoscopy and exploratory laparotomy, while the best choice of treatment is ovariohysterectomy and pathohistological examination. The prognosis for most uterine tumors after ovariohysterectomy is favorable due to the large percentage of benign tumors. If the pathohistological examination reveals a malignant tumor, the prognosis can be good if there are no metastases and local infiltration present. The results of this research confirmed the fact that uterine tumors are rare, that leiomyomas are the most common tumors and that they occur later in life, especially in crossbreed bitches.