There are 11 US Post Offices in Iowa County serving a total of 22,582 residents equating to 2,053 residents per post office. It's estimated that approximately 36,043 packages are handled across the 11 county post offices annually. Iowa County is a county located in the U.S. state of Wisconsin. As of the 2010 census, the population was 23,687. Its county seat and largest city is Dodgeville. When created, it was part of the Michigan Territory. Iowa County is part of the Madison, Wisconsin, Metropolitan Statistical Area."