The William Ross Rust House is a house in Tacoma, Washington, United States, built in 1905 for William Ross Rust, then President of the Tacoma Smelter and Refining Company.

That same year the Tacoma Smelter was acquired by ASARCO, which was controlled by the Guggenheim family.

The building has a green, glazed terra cotta tile roof, 18 rooms, 4 baths, and 8 fireplaces.

It was modeled after the John A. McCall Mansion in Monmouth County, New Jersey (built in 1903, destroyed by fire in 1927).

This article about a property in Washington on the National Register of Historic Places is a stub.