Built in 1918, the post office was designed by Walter D. Bliss and William B. Faville, architects known for their work in San Francisco.

The building's roofline and arched arcade entrance with Doric columns were inspired by the Italianate style, while its detail work, including terra cotta reliefs, quoining, and decorative keystones, is Beaux-Arts styled.

In addition, it is one of the few ornately designed buildings in Willows and has been called the "most sophisticated and imposing" of those which exist.

[2] The post office was added to the National Register of Historic Places on January 11, 1985.

This article about a property in Glenn County, California on the National Register of Historic Places is a stub.