Buena Vista is a historic home located at New Castle, New Castle County, Delaware. It was built between 1845 and 1847, and is a two-story, five-bay, brick dwelling in the Greek Revival style. It has a service wing and a long wing designed by architect R. Brognard Okie containing a long hall and library. It features a full width verandah supported by Doric order columns. It was the home of U.S. Senator and Secretary of State John M. Clayton (1796-1856) and U.S. Senator and Delaware Governor C. Douglass Buck (1890-1965), who donated it to the State of Delaware.[2][3] It is operated as the Buena Vista Conference Center by the State of Delaware.
The estate originally was named in commemoration of the Battle of Buena Vista in the Mexican–American War.[4] It was added to the National Register of Historic Places in 1971.[1]