 It is located in the northeastern part of the state of Mexico, in the Valley of Mexico north of Mexico City proper.Together with Atizapán, it comprises the dense Region XII of Mexico State.Around the 11th century, a people called the Amaquemecan (after whom the municipality of Amecameca is named), migrated to this area following their leader Xolotl to look for a better climate and more food to sustain themselves.