Yes, they are all US States.
Depending on how you define what the southwestern region of the US is, the states in the southwest region of the US are: California Arizona New Mexico Nevada Utah Colorado Texas Oklahoma
Arizona New Mexico Oklahoma Texas
Arizona, New Mexico, Oklahoma, and Texas.
There Are 4 States In The Southwest Region. Texas , Arizona , New Mexico , And Oklahoma.
Arizona, New Mexico, Oklahoma, and Texas.
The four Southwestern states in the United States are Arizona, New Mexico, Nevada, and Utah.
Caufornia,nevada,utah,arizona,colorado,nuevo mexico,texas.
Texas Utah New Mexico Oklahoma Arizona
New Mexico, Utah, Wyoming, Nebraska, Kansas, Oklahoma and the corner of Arizona (where the 4 states come together).
Oklahoma is the smallest of the listed states.
Oklahoma, Texas, New Mexico, and Arizona make up the southwestern part of the united states.
Texas shares borders with the U.S. states of Arkansas, Louisiana, New Mexico and Oklahoma. Texas also shares borders with the Mexican states of Chihuahua, Coahuila, Nuevo Leon, and Tamaulipas.