Southwestern United States

geographical region of the USA

The Southwestern United States (called the American Southwest or simply the Southwest) is a region of the western United States. The region is warmer than the northern states and drier than the eastern states. The area includes Arizona and New Mexico, as well as the nearby parts of Southern California, Nevada, Utah, and Colorado and western Texas. The Southwest is growing really fast, big cities in the area are Phoenix, Las Vegas, El Paso, Albuquerque, and Tucson. It is one of the fastest growing parts of the country.

Regional definitions vary from source to source. The states shown in dark red are usually included, while all or portions of the striped states may or may not be considered part of the Southwestern United States.

The main parts of the Southwest are the ones that were in Santa Fe de Nuevo México and the New Mexico Territory.