Green Lake County
There are 6 US Post Offices in Green Lake County serving a total of 11,787 residents equating to 1,965 residents per post office. It's estimated that approximately 18,813 packages are handled across the 6 county post offices annually. Green Lake County is a county located in the U.S. state of Wisconsin. As of the 2010 census, the population was 19,051. Its county seat is Green Lake. In 2010, the center of population of Wisconsin was located in Green Lake County, near the city of Markesan.