Constipation is a common problem in the general population and is particularly prevalent among hospitalized elderly patients with hip fracture due to lack of mobility, medications, and lack of privacy associated with hospitalization. This study aimed to determine the incidence of postoperative constipation and the effects of selected risk factors on constipation development in elderly patients with hip fracture. The study used a descriptive, cross-sectional, and prospective design. Data were collected on the second postoperative day and upon discharge. The study sample included 150 patients. The constipation incidence rate was found to be 77.70%. Of all the patients developing constipation, 87.70% did not have a normal bowel movement even upon discharge. A significant difference was found between constipation development and the total score for constipation risk assessment, postponing defecation, psychological or behavioral barriers to defecation in the hospital environment, preservation of privacy for defecation, and return to normal bowel movement upon discharge. Based on the results, nurses should determine the risk factors for constipation unique to each patient in the postoperative period and conduct appropriate preventive interventions.