Clayton is an unincorporated community and census-designated place in Stevens County, Washington, United States.

It is located along U.S. Route 395 4.5 miles (7.2 km) northwest of Deer Park, and has a post office with ZIP code 99110.

It, along with most of the town, was lost to a catastrophic fire in 1908, but the town rebuilt, and the new Washington Brick, Lime, and Sewer Pipe company became noted for its high-quality products, including beautiful decorative terra cotta panels, which were crafted largely by skilled artisans who had immigrated to Washington from northern Italy.

[6] It was the birthplace of the Hollywood writer Robert Carson, and the residence of artist Leno Prestini.

This Stevens County, Washington state location article is a stub.