THE BLACK DIAMOND LAND BRIEF
Land in the
Eastern Puget Uplands setting.
Black Diamond city has 6.6 square miles of land in King County. Its Census reference point is in Eastern Puget Uplands, within Puget Lowland.
A glacial lowland surrounds Puget Sound with islands, bays, peninsulas and rolling terrain. Moraines, outwash plains and river terraces create a varied setting beneath the region's maritime climate.
Regional context: Puget Lowland ↗ · Classification at the Census reference point
Black Diamond and King County
Black Diamond is associated with King County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
Black Diamond by land and water
The Census records 0.6 square miles of water within Black Diamond, or 8.3% of its total area. That share is close to King County’s 8.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Black Diamond city has 5.3 times the land area of nearby Ravensdale CDP (1.24 square miles). These areas describe boundaries, not comparable property prices.

