There are 17 US Post Offices in Itasca County serving a total of 43,685 residents equating to 2,570 residents per post office. It's estimated that approximately 69,726 packages are handled across the 17 county post offices annually. Itasca County is a county located in the State of Minnesota. As of the 2010 census, the population was 45,058. Its county seat is Grand Rapids. The county is named after Lake Itasca, which is in turn a shortened version the Latin words veritas caput, meaning 'truth' and 'head', a reference to the source of the Mississippi River. Portions of the Bois Forte and Leech Lake Indian reservations are in the county."