Arizona is in the southern United States.
Arizona ( [ ɛərᵻˈzoʊnə , _ ærᵻ - ] ) ( Hoozdo Hahoodzo [ xòːztò xɑ̀xòːtsò ] O'odham : Alĭ ṣonak [ ˡaɺi ˡʃonak ] ) is a state in the southwestern region of the United States . Southern United States . Arizona and New Mexico , which are geographically in the southern part of the country , are rarely considered part , while West Virginia , which separated from Virginia in 1863 , commonly is .