New Mexico is one of the 50 states in the United States, and one of the last to be admitted into the union. Admitted on January 6, 1912 it became the 47th state. Located in the southwestern region of the U.S, New Mexico is the 4th largest state by land area in the continental U.S, but is among the least populated with a population density of only 15 per square mile. With a high percentage of Hispanic Americans and Native Americans, the demographics and culture of the state has a unique Spanish, Mexican, and American Indian influence. The climate of the state is highly arid and its territory is mostly covered by mountains and desert.