There are 7 US Post Offices in Forest County serving a total of 9,829 residents equating to 1,404 residents per post office. It's estimated that approximately 15,688 packages are handled across the 7 county post offices annually. Forest County is a county in the U.S. state of Wisconsin. As of the 2010 census, the population was 9,304. Its county seat is Crandon. The Forest County Potawatomi Community and the Sokaogon Chippewa Community have reservations in Forest County."