There are 46 Mail & Shipping Services in Washington, serving a population of 7,169,967 people in an area of 66,439 square miles. There is 1 Mail & Shipping Service per 155,868 people, and 1 Mail & Shipping Service per 1,444 square miles.
The state of Washington is ranked 13th in Mail & Shipping Services per capita, and 24th in Mail & Shipping Services per square mile.