There are 5 US Post Offices in Lincoln County serving a total of 5,351 residents equating to 1,070 residents per post office. It's estimated that approximately 8,541 packages are handled across the 5 county post offices annually. Lincoln County is a county located in the U.S. state of Minnesota. As of the 2010 census, the population was 5,896. Its county seat is Ivanhoe."