Acuña Municipality

 Acuña is one of the 38 municipalities of Coahuila, in north-eastern Mexico. The municipal seat lies at Ciudad Acuña, which contained over 98% of the municipality's population in 2010. The municipality covers an area of 11,487.7 km2 and is located on the international border between Mexico and the USA, here formed by the Río Bravo del Norte (Rio Grande), adjacent to the U.S. state of Texas.

In 2015, the municipality had a total population of 181,426 inhabitants. Acuña is currently the fastest growing city in Mexico.

Towns and villages
The largest localities (cities, towns, and villages) are:

Adjacent municipalities and counties

 * Jiménez Municipality - southeast
 * Zaragoza Municipality - south
 * Múzquiz Municipality - south
 * Ocampo Municipality - southwest
 * Brewster County, Texas - northwest
 * Terrell County, Texas - north
 * Val Verde County, Texas - northeast