Otter Tail County
There are 18 US Post Offices in Otter Tail County serving a total of 52,947 residents equating to 2,942 residents per post office. It's estimated that approximately 84,509 packages are handled across the 18 county post offices annually. Otter Tail County is a county located in the U.S. state of Minnesota. As of the 2010 census, the population was 57,303. Its county seat is Fergus Falls. The county was formed in 1858 and organized in 1868. Otter Tail County comprises the Fergus Falls, MN Micropolitan Statistical Area."