Lantz Hall is a historic building located at Massanutten Military Academy, Woodstock, Shenandoah County, Virginia. It was built in 1907-1909, and is a 3 1/2-story, seven bay by three bay, brick faced frame building in the Late Gothic Revival style. It features a projecting Gothic tower pavilion and three-bay pointed-arched porch. In 1926, a three-story, seven-by-three bay, gable-roofed ell was constructed to the rear. The building houses a dormitory, classrooms, a gymnasium/firing range, and an auditorium. It was the second building built on the Massanutten Military Academy campus.