This is an example of a poorly stated question. There are several plains states and they are in the Lower 48. What else the questioner seeks is indecipherable.
The plains are located in several states.
The plains are located in several states.
Within the states
There are actually four states whose boundaries lie entirely in the Great Plains. They are North Dakota, South Dakota, Nebraska, and Kansas.
The Central Lowlands lie between the Appalachians Highlands Great and the Plains.
The Rocky Mountains lie just west of the Great Plains. They stretch from Canada down to New Mexico and are known for their rugged terrain and diverse ecosystems. The Rocky Mountains act as a natural barrier between the Great Plains and the western states.
Several states inhabit the Great Plains in the center of the United States. Some of the states include North Dakota, South Dakota and Nebraska.
West Siberian Plains
plains
That depends what you refer to when you say "This country".
s. dakota, nebraska and kansas
No.