The most northerly California Carnegie community, Yreka is just south of the Oregon border on Interstate Highway 5. Many features of the old downtown are reminiscent of its early frontier mining heritage. In contrast is the small, Classical Revival, one story Carnegie building, now the home of the municipal police department. It was added to the National Register of Historic Places in 1992.
After consolidation of city and county libraries at a new location, the police department moved into the Carnegie building. In 1980, when they in turn required more space, an addition was built to the rear.