The Sword Coast North is a region on the northwestern coast of Faerûn, and stretches from Waterdeep in the south and to the Spine of the World north, and to the Sword Coast to the west and to the Long Road to the east. Neverwinter, Port Llast, Luskan, and Icewind Dale are all part of the Sword Coast North. Because of its quasi-lawless, "frontier" setting, being a place where all races can meet and interact.
As such, the metropolises of Waterdeep and Baldur's Gate are not to be counted as part of the Sword Coast, instead Baldur's Gate lies in the Western Heartlands, while Waterdeep is highly independent.