what are the states that are apart of the great plains states?

Answer 1

The Great Plains are the broad expanse of prairie and steppe which lie east of the Rocky Mountains in the United States and Canada. This area covers parts of the U.S. states of Colorado, Kansas, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota, Texas and Wyoming, and the Canadian provinces of Alberta, Manitoba and Saskatchewan.

Or you could break it down like this
The Great Plains are the westernmost portion of the vast North American Interior Plains, which extend east to the Appalachian Plateau. The United States Geological Survey divides the Great Plains in the United States into ten physiographic subdivisions:

* Missouri Plateau, glaciated – east-central South Dakota, northern and eastern North Dakota and northeastern Montana
* Missouri Plateau, unglaciated – western South Dakota, northeastern Wyoming, southwestern South Dakota and southeastern Montana
* Black Hills – western South Dakota
* High Plains – eastern New Mexico, northwestern Texas, western Oklahoma, eastern Colorado, western Kansas, most of Nebraska (including the Sand Hills) and southeastern Wyoming
* Plains Border – central Kansas and northern Oklahoma (including the Flint, Red and Smoky Hills)
* Colorado Piedmont – eastern Colorado
* Raton section – northeastern New Mexico
* Pecos Valley – eastern New Mexico
* Edwards Plateau – south-central Texas
* Central Texas section – central Texas

Answer 2

The Great Plains encompass parts of Texas, New Mexico, Colorado, Oklahoma, Kansas, Nebraska, North & South Dakota, Wyoming, and Montana.