A new post office opened in the Sioux County seat of Orange City on October 31, 1968. The building featured the latest equipment for heating and air conditioning, florescent lighting, a “modern” counter, and a box lobby that was open daily for 15 hours. The post office was officially dedicated on January 11, 1970, with a ceremony that featured a performance from the Maurice-Orange City Community School band, presentation of the Colors by local American Legion Post 329 and remarks from Stan Greigg, a U.S. Postal Service official based in Washington, D.C. Following the dedication program, a light lunch was served and a formal ribbon-cutting took place.