McLean County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 9,771. Its county seat is Washburn. The Dakota Territory legislature created the county on March 8, 1883, with areas partitioned from Burleigh, Sheridan, and Stevens counties. The county was named for John A. McLean, the first mayor of Bismarck. …McLean County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 9,771. Its county seat is Washburn. The Dakota Territory legislature created the county on March 8, 1883, with areas partitioned from Burleigh, Sheridan, and Stevens counties. The county was named for John A. McLean, the first mayor of Bismarck. The county organization was completed on November 1 of that year. Its boundaries were altered in 1885, in 1892, and in 1908. It has retained its current configuration since November 3, 1908, when a portion of its previous territory was partitioned to recreate Sheridan County.
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