There are 5 US Post Offices in Mclean County serving a total of 9,431 residents equating to 1,886 residents per post office. It's estimated that approximately 15,053 packages are handled across the 5 county post offices annually. McLean County (/m\u0259\u02c8kle\u026an/) is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 9,531. Its county seat is Calhoun. McLean is a prohibition or dry county. McLean County is part of the Owensboro, KY Metropolitan Statistical Area, which has a population of some 114,752 (2010 census)."