There are 269 Plumbing Services in Washington County, Oregon, serving a population of 572,071 people in an area of 725 square miles. There is 1 Plumbing Service per 2,126 people, and 1 Plumbing Service per 2 square miles.
In Oregon, Washington County is ranked 26th of 36 counties in Plumbing Services per capita, and 2nd of 36 counties in Plumbing Services per square mile.