There are 5 US Post Offices in Chippewa County serving a total of 11,704 residents equating to 2,341 residents per post office. It's estimated that approximately 18,681 packages are handled across the 5 county post offices annually. Chippewa County is a county located in the U.S. state of Minnesota. As of the 2010 census, the population was 12,441. Its county seat is Montevideo. The county was formed in 1862 and organized in 1868."