The five landform regions that make up the United States are the West, Midwest, Northeast, Southwest and Southeast regions. The states that comprise these individual regions are grouped according to their locations on the continent, as well as the major physical features and climatic conditions that are common in these areas.
Major landforms in the West include the Sierra Nevada and Rocky Mountains, while the Midwest is home to the Great Plains and the Great Lakes. The Appalachian Mountains traverse through the Northeast and Southeast regions, while the major geographical features found in the Southwest include the Rocky Mountains, Grand Canyon and the Gulf of Mexico. Other known sub-regions in the U.S. are the Pacific Northwest, New England and Mid-Atlantic regions.