The W.H.H. Clayton House, now the Clayton House Museum, is a historic house museum at 514 North 6th Street in Fort Smith, Arkansas. It is a 2+1⁄2-story L-shaped wood-frame structure, with a projecting front clipped-gable section. It has elaborate Victorian trim, including detailed window surrounds, paneled projecting bays on the front and side, and a porch with carved columns and brackets, and delicately turned balusters ringing the porch roof. The house was built in 1882 for W. H. H. Clayton, who served as a local prosecutor and was member of family prominent in state politics, and is one of the few high-quality houses of the period to survive. It is now a museum.