The Oscar Chamber House is a historic house at 3200 South Dallas Street in Fort Smith, Arkansas. Built in 1963-64 to a design by Arkansas architect Ernie Jacks, it is a prominent local example of residential Mid-Century Modern architecture, set in a neighborhood of more conventional ranch and split entry houses. It is a single-story frame structure, with a broad gabled roof, vertical board siding, and a concrete foundation. It has casement windows and sliding glass doors providing access to the outside. The structure is basically a U shape built around a courtyard at the back.