Aim: Developmental dysplasia of hip (DDH) is a common disease that can be treated successfully if early diagnosis and treatment are possible. In our study, we aimed to determine the incidence of DDH by examining the pelvic radiographs of 12–24 months old children who were admitted to the pediatric emergency department for reasons other than suspicion of DDH. Material and Method: Between May 1, 2016 and March 9, 2017, 12–24 months old children who were admitted to our pediatric emergency department for various reasons were included in the study. The abdominal radiographs of these patients were obtained from the digital recording system and the radiographs were examined. For measurement; hip quadrants, ShentonMenard line and acetabular index angle were examined and used for diagnosis. The incidence of DDH was calculated with the data obtained. Results: A total of 2044 patients were included in this study and 152 of them were diagnosed with DDH. Of the 152 patients with DDH, 98 were female and 54 were male. 73 of these patients had pathology in bilateral hips. Of the 152 patients with pathology, 23 had no information about this pathology. It was found that 15.1% of the patients diagnosed with DDH were not diagnosed with DDH. When hip dislocation was compared according to gender, Pearson chi-square test was found to be p<0.001 and it was found to be significantly higher in girls. Conclusion: The early diagnosis of patients with DDH will prevent the irreversible hip problems and surgeries in older ages. Emergency physicians should keep in mind the diagnosis of DDH, especially when examining the abdominal radiographs of children under 2 years of age, regardless of their complaints.