: Introduction: The knee joint is one of the most complex and frequently injured joints in the human body, serving as a critical hinge between the femur, tibia, and patella. The diagnosis of traumatic knee injuries has historically relied on clinical examination and conventional imaging modalities, such as radiographs and computed tomography (CT). Magnetic Resonance Imaging (MRI) has emerged as the gold standard for evaluating traumatic knee injuries due to its unparalleled ability to provide high-resolution, multiplanar images of the knee joint without the use of ionizing radiation. MRI offers exceptional soft tissue contrast, enabling the visualization of ligaments, tendons, menisci, cartilage, and bone marrow in exquisite detail. Materials and Method: This study was a retrospective analysis conducted at a tertiary care hospital over a period of one year. The study aimed to evaluate the diagnostic accuracy of Magnetic Resonance Imaging (MRI) in detecting traumatic knee injuries by correlating MRI findings with arthroscopic or surgical outcomes. The study protocol was approved by the Institutional Ethics Committee, and informed consent was obtained from all participants. Patients aged 18–50 years with a history of acute knee trauma (e.g., sports injury, motor vehicle accident, or fall) were included. Result: The study included 150 patients (90 males and 60 females) with a mean age of 32 years (range: 18–50 years). All patients presented with traumatic knee injuries and underwent MRI followed by arthroscopic or surgical evaluation. MRI demonstrated excellent sensitivity (96%) and specificity (92%) for ACL tears, with slightly lower but still high accuracy for PCL tears (90% sensitivity, 94% specificity). MRI showed high diagnostic accuracy for both medial and lateral meniscal tears, with sensitivity and specificity exceeding 90%. MRI's sensitivity and specificity for cartilage defects were slightly lower (88% and 85%, respectively), likely due to the difficulty in detecting early or subtle cartilage damage. Conclusion: Magnetic Resonance Imaging is an indispensable tool in the evaluation of traumatic knee joint injuries. Its ability to provide detailed visualization of soft tissue structures, combined with high diagnostic accuracy, makes it the preferred imaging modality for assessing ligamentous, meniscal, and cartilaginous injuries.