There are 10 US Post Offices in Wood County serving a total of 65,947 residents equating to 6,595 residents per post office. It's estimated that approximately 105,259 packages are handled across the 10 county post offices annually. Wood County is a county located in the U.S. state of Wisconsin. As of the 2010 census, the population was 74,749. Its county seat is Wisconsin Rapids. The county is named after Joseph Wood, a member of the Wisconsin State Assembly. Wood County comprises the Wisconsin Rapids-Marshfield, WI Micropolitan Statistical Area and is included in the Wausau-Stevens Point-Wisconsin Rapids, WI Combined Statistical Area."