High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! McLean County is a county located in the U.S. state of Kentucky; its population was 9,938 in the 2000 Census. McLean County's county seat is at Calhoun. McLean County, with Daviess and Hancock Counties, is part of the Owensboro Metropolitan Statistical Area (MSA), which has a population of some 110,314 (2002 estimate). McLean is a prohibition or dry county.