South King County, as represented by the related regional profile
On the map to the left, the shaded portion is how the South King subregion is being defined; it was largely based upon the King County urban growth lines, but also influenced by 14 different zip codes and numerous municipal boundaries. The southern border is the Pierce-King County line and the western boundary is Puget Sound. The northern and eastern boundaries wer subjective, defined by the selected zip codes and the transition to more rural communities, respectively.
As King County membership changes, this boundary will be reviewed and potentially adjusted, to ensure that it reflects all participating communities.