There are 65 Plumbing Supply Stores in Washington, serving a population of 7,169,967 people in an area of 66,439 square miles. There is 1 Plumbing Supply Store per 110,307 people, and 1 Plumbing Supply Store per 1,022 square miles.
The state of Washington is ranked 35th in Plumbing Supply Stores per capita, and 29th in Plumbing Supply Stores per square mile.