There are different definitions for the 'Southwestern US'. New Mexico and Arizona are on the list most of the time. Texas and Oklahoma are often considered a sub-region of the South rather than the West. California, Nevada, Utah and Colorado are usually excluded.
The United States of America...or U.S.A. XD
Southwestern United States.
The southwestern United States is a desert region.
Arizona is in the Southwestern United States. The United States Census Bureau classifies Arizona in the West Region.
"Southwestern" is one word when referring to something in the southwestern direction or a region, such as Southwestern United States.
Arizona is located in the southwestern region of the United States. East of California, south of Utah, West of New Mexico and north of the country of Mexico.
Southwestern United States and California.
Northern Africa, or the southwestern United States.
Mexican
Southwestern United States and California.
The southwestern United States has many canyons and deserts.
Some cities in the southwestern region of the United States include Los Angeles, Phoenix, Las Vegas, and San Diego.