McLean County North Dakota has 7 places on the National Register of Historic Places including 1 place of National significance and 4 places of Statewide significance. Significant places include Holy Trinity Ukrainian Greek Orthodox Church, Former McLean County Courthouse, Holy Trinity Ukrainian Greek Orthodox Church, McLean County Courthouse and Soo Line Depot.
Some of the country's most noteable architects helped create the McLean County places including John Schowchuk, John Krivatski, Pauley Jail Bldg. Co., Hancock Bros., William J. Keith, Carl Rennich and Olof A. Anderson. Prominent architectural styles found in McLean Country are Colonial Revival and Late 19th And Early 20th Century American Movements.