The crossword solution for the term N. or S. State is DAK, which stands for North Dakota or South Dakota. Both states are located in the Midwestern region of the United States and are part of the Great Plains. North Dakota was admitted to the Union in 1889, while South Dakota was admitted in 1889. Both states are known for their agricultural production, with North Dakota being the leading producer of spring wheat and South Dakota being the leading producer of sunflowers.