Blunt trauma-induced diaphragmatic hernia (DIH) is a rare but potentially life-threatening condition. Prompt diagnosis and management are crucial for successful outcomes. We present the case of a 40-year-old male who sustained blunt abdominal and chest trauma resulting in a left DIH with extensive gastrointestinal involvement. The patient underwent emergency laparotomy with primary repair of the diaphragmatic defect and resection of gangrenous stomach and bowel segments. Postoperatively, the patient recovered well and was discharged on day 14. Diagnosis of DIH relies on high clinical suspicion and radiological imaging, with CT scan being the modality of choice. Management involves surgical repair, either by primary closure or with the use of mesh, depending on the extent of the injury and presence of infection. Mortality rates are high in emergency repairs, especially when associated with bowel necrosis and perforation. This case highlights the importance of early recognition and timely intervention in DIH. Clinicians should maintain a high index of suspicion for DIH in patients presenting with a history of trauma and respiratory or abdominal symptoms. Improving awareness and understanding of abdominal injuries in trauma centers can help in early diagnosis and appropriate management, ultimately leading to better outcomes for patients with DIH.