Vincennes Fortnightly Club is a historic Women's club clubhouse located at Vincennes, Knox County, Indiana. It was built in 1928, and is a two-story, Colonial Revival style brick and Indiana limestone building. The tripartate front facade features arched openings and a decorative metal railed balcony on the second floor. The dumbbell shaped building consists of a main entrance block, auditorium, and rear stage section. It was added to the National Register of Historic Places in 2000.