Nuevo León (Spanish for "New León", after the former kingdom in Spain) is a state located in northeastern Mexico. It borders the states of Tamaulipas to the north and east and San Luis Potosí to the south, and Coahuila to the west. To the north, Nuevo León accounts for a 15 kilometer (9 mi) stretch of the U.S.-Mexico border adjacent to the U.S. state of Texas.

It was originally founded by Alberto del Canto, although frequent raids by Chichimecas, the natives of the north, prevented the establishment of almost any permanent settlements. Subsequent to the failure of del Canto to populate Nuevo León, Luis Carvajal y de la Cueva, at the head of Portuguese and Spanish settlers, requested permission from the Spanish King to attempt to repopulate the area which would be called the New Kingdom of León, it eventually became (along with the provinces of Coahuila, Nuevo Santander and Texas) one of the Eastern Internal Provinces in Northern New Spain.

In the 19th century, Nuevo León was in a growth spurt and the bargain land deals attracted immigrants of German, Slavic, French, Italian, Jewish and Anglo-American origin. The capital of Nuevo León is Monterrey, the third largest city in Mexico with over three million residents. Monterrey is a modern and relatively affluent city, and Nuevo León has long been one of Mexico's most industrialized states.