It borders the municipality of Doctor Arroyo to the north, the only municipality it borders in Nuevo León; the municipality also borders San Luis Potosí and Tamaulipas.[1]
Population
The municipality has 7,095 inhabitants, of which 1,214 live in the town of Mier y Noriega, the seat of the municipality. Other settlements with more than 500 residents include La Cardona, Cerros Blancos, Las Palomas, and Tapona Morena.