It is Union County.
New Mexico qualifies as such.
The complete set of borders for New Mexico are Mexico, Texas, Oklahoma, Arizona, Utah, and Colorado,
Louisiana,Arkasas,New Mexico,Oklahoma borders Texas.
Oklahoma shares borders with:ColoradoKansasMissouriArkansasTexasNew Mexico
New Mexico, Colorado, Kansas, Missouri, Arkansas and Texas share its borders.
Texas borders several states, including New Mexico, Oklahoma, and Louisiana, as well as the Gulf of Mexico to the South.
New Mexico, Colorado, Kansas, Missouri, Arkansas and Texas share its borders.
Cimarron County, OK. It borders Colorado, Kansas, New Mexico, and Texas.
It is Dona Ana County.
Oklahoma is bordered on the far west by New Mexico, and on the near-west by Texas.
New Mexico is bordered by Colorado to the north, Texas to the east and south, Oklahoma to the east, and Arizona to the west. New Mexico also borders the Mexico states Chihuahua and Sonora to the south.
Texas borders the US states of New Mexico, Oklahoma, Arkansas, and Louisiana as well as the Mexican states of Chihuahua, Coahuila, Nuevo Leon, and Tamaulipas.