Frank C. Barnes House, historic house in Portland, Oregon, USA

The Frank C. Barnes House is a large residential building in northeast Portland, Oregon, built in 1913 and blending Jacobethan, Colonial Revival, Neoclassical, and eclectic architectural features. The tall windows, decorative trims, and symmetrical design give the house a formal, stately appearance that has remained largely unchanged for over a century.

The Frank C. Barnes House is listed on the National Register of Historic Places. Its design was tentatively ascribed to Portland architect David L. Williams, but was more recently linked to the firm Stokes & Zeller. The building is also known as the Barnes Mansion.

The house is known locally as the Barnes Mansion, after its original owner Frank C. Barnes. Author Beverly Cleary, who grew up in Portland, called it "haunted" in her Ramona Quimby series, which is how many residents first heard of the building.

The house stands in northeast Portland at 45.54706, -122.62755, and is a private residence, so visitors view it from the public street rather than entering. Its massing and roofline are best read from across the road, where the full facade fits in view.

The house's design was long tentatively credited to Portland architect David L. Williams, but more recent research links it to the firm Stokes & Zeller. Beverly Cleary, who grew up in the same northeast Portland area, called the house "haunted" in her Ramona Quimby series.