There are 15 US Post Offices in Manitowoc County serving a total of 80,874 residents equating to 5,392 residents per post office. It's estimated that approximately 129,084 packages are handled across the 15 county post offices annually. Manitowoc County /\u02c8m\u00e6n\u1d7bt\u0259w\u0254\u02d0k/ is a county in the U.S. state of Wisconsin. As of the 2010 census, the population was 81,442. Its county seat is Manitowoc. The county was created in 1836 prior to Wisconsin's statehood and organized in 1848. Manitowoc County comprises the Manitowoc, WI Micropolitan Statistical Area."