Fractures of the femoral neck have always been a great challenge to orthopaedic surgeons. Innumerable methods of treatment are available, but none of them gives uniformly good results. They are either classified as displaced or undisplaced. The rates of complication are higher for fixation of displaced femoral neck fractures. The risk of nonunion in femoral neck fracture fixation is 5 to 15% and the risk of avascular necrosis is 7 to 12%. Hence, a significant number of cases with internal fixation for femoral neck fracture go on to salvage arthroplasty. Cementless Total hip arthroplasty (THA) offers a good practical solution and has a superior outcome over conventional osteotomies and grafting as well as other forms of arthroplasties as cemented or bipolar prostheses. The aim of this work was to assess the results of cementless total hip arthroplasty in the treatment of femoral neck fractures in active adults complicated with non union with or without avascular necrosis, and osteoarthritis.