Oaxaca de Juárez, or simply Oaxaca, is the capital and largest city of the eponymous Mexican state of Oaxaca. It is the municipal seat for the surrounding municipality of Oaxaca, the most populous municipality in Oaxaca and the fourth most densely populated municipality in Oaxaca, only being less densely populated than San Jacinto Amilpas, Santa Lucía del Camino, and Santa Cruz Amilpas. It is in the Centro District in the Central Valleys region of the state, in the foothills of the Sierra Madre at the base of the Cerro del Fortín, extending to the banks of the Atoyac River.