There are 206 Mailing Services in King County, Washington, serving a population of 2,118,119 people in an area of 2,115 square miles. There is 1 Mailing Service per 10,282 people, and 1 Mailing Service per 10 square miles.
In Washington, King County is ranked 35th of 39 counties in Mailing Services per capita, and 1st of 39 counties in Mailing Services per square mile.