Hidalgo, officially the Free and Sovereign State of Hidalgo, is one of the 31 states which, along with Mexico City, constitute the 32 federal entities of Mexico. It is divided into 84 municipalities and its capital city is Pachuca de Soto. It is located in east-central Mexico and is bordered by San Luis Potosí and Veracruz on the north, Puebla on the east, Tlaxcala and State of Mexico on the south and Querétaro on the west.

San Luis Potosí, officially the Free and Sovereign State of San Luis Potosí, is one of the 32 states which compose the Federal Entities of Mexico. It is divided in 58 municipalities and its capital city is San Luis Potosí (City).