There are 124 Building Supply Stores in King County, Washington, serving a population of 2,118,119 people in an area of 2,115 square miles. There is 1 Building Supply Store per 17,081 people, and 1 Building Supply Store per 17 square miles.
In Washington, King County is ranked 7th of 39 counties in Building Supply Stores per capita, and 1st of 39 counties in Building Supply Stores per square mile.