There are 332 Day Spas in King County, Washington, serving a population of 2,118,119 people in an area of 2,115 square miles. There is 1 Day Spa per 6,379 people, and 1 Day Spa per 6 square miles.
In Washington, King County is ranked 4th of 39 counties in Day Spas per capita, and 1st of 39 counties in Day Spas per square mile.