Postal service came to the Jasper County town of Mingo in December 1883. Mail volume in the growing community warranted two deliveries daily to the post office by 1910; that year, revenue from the office exceeded $800. In 2008, the post office moved to the former home of Mingo Trust and Savings Bank. The high rent associated with the upgraded facilities nearly led to an emergency closure of the Mingo Post Office. Town officials averted the closure by purchasing the old bank building and significantly reducing the monthly rent.