The Willmar Auditorium built by WPA is one of the most handsome auditoriums in Minnesota. It has two stories and a basement. In some sections of the building it has a third story. It was built at a cost of $160,000. The building has a concrete foundation, reinforced concrete slabs, steel roof trusses, and a wood roof. The walls are of brick with stone trim. The sculpture over the entrance was done by the Federal Art Project. The basement accommodates a band room, dressing rooms, showers, and mechanical equipment rooms. On the first floor are the auditorium, stage, and kitchen and war memorial room. The second floor has meeting rooms and a projection room.

PWA Moderne realized primarily through a pattern of contrasting stone
inlaid in the brick walls. Over the entrance are three relief panels in stone depicting the glories of agriculture, government, and transportation.

The Willmar War Memorial Auditorium features engraved stones from each state to honor Minnesota veterans. It was built between 1935 and 1938.