Proximal humerus fractures are common musculoskeletal injuries, accounting for 4% to 5% of all fractures in adults. Most proximal humerus fractures are undisplaced or minimally displaced, stable fractures that can be successfully treated nonsurgically. Displaced fractures of the proximal humerus, however, are much more complex and represent a treatment challenge for the orthopaedic surgeon. Although debate continues over the treatment of displaced proximal humerus fractures, locked plating systems have grown increasingly popular as an adjunct to surgical management. Techniques for locked plating of two-, three-, and four-part proximal humerus fractures, anterior fracture-dislocations, and posterior fracture-dislocations are described herein. Familiarity with locking plate-screw implant designs, potential iatrogenic and postoperative complications, and effective rehabilitation protocol is important in helping the patient with a displaced proximal humerus fracture to achieve a good surgical outcome.