Acute gastroenteritis is a major cause of pediatric morbidity and death worldwide, with high healthcare utilization, ongoing practice variation, and significant family burden, especially in developing countries, and young children under the age of five are the most vulnerable. The objectives of the study are to: To assess the factors associated with gastroenteritis in children 2-5 years of age and also to investigate if there is a correlation between socio-demographic data with some of the factors of gastroenteritis A quantitative /descriptive study was conducted, with A non-probability /convenience sampling, The sample size was (111) children who had gastroenteritis and were admitted in Ranya maternity and pediatric teaching hospital and pediatric ward in Shahidan Qaladze Teaching Hospital. The data was collected by modifying the questionnaire that was asked from the patient’s parents by interview (face to face) method. The results of the study indicate that most of the cases were between the age (of 24-28) months 22%, (29-33) months 14%, (32-38) months14% and (59and more) months 28% with the (Mean =42) months. The male was more affected (58%) than the female (42%). Most of the patients were from urban areas (67%). According to the findings, there is a correlation between BMI (body mass index) with gastroenteritis because the P-value is less than 0.05, (P-value =0.04566), there is a significant correlation between Type of feeding and eating Type with Gastroenteritis because the p-value for both of these correlations is less than (0.05), the p-value of correlation between Feeding type and Gastroenteritis is (0.0374). There is a correlation between making the water safer to drink with gastroenteritis because the P-value less than 0.05, and the P-value is (0.0423). Children under 5 years of age are vulnerable to suffering gastroenteritis, the factors, including BMI (body mass index) ،methods that are used to clean water safer, feeding type, and eating type; are those factors that make clients vulnerable to suffer gastroenteritis.