Amidon is the county seat of Slope County and is located in Southwest North Dakota. As of the 2000 Census, Amidon was the second least populace county seat in the United States with a population of 26 (after Mentone in Loving County Texas). The whole county has a population of 776 (as of the 2000 census). Pictured here is the Slope County Courthouse. I am not aware if the courthouse is of any historical significance or even when it was built; but it is fairly unique.
I think it is now the least populace as the population in Amidon dropped to 23 and the population in Mentone exploded to about 90.
White Butte at 3506 feet (1062 meters) is the highest point in North Dakota and is located in Slope County.