Antofagasta is a port city and episcopal see in northern Chile, about 700 miles north of Santiago.
Antofagasta is a long and narrow city located south of the Península de Mejillones and north of the Cerro Coloso, 768 miles north of Valparaíso. The city is surrounded on its eastern edge by steep hills that are part of Chile's Cordillera de la Costa, and by the Pacific Ocean to the west.

Mejillones is a small port 65 km to the north, on the northern part of Península de Mejillones. About 90 km north of Antofagasta is Hornitos Antofagasta, a beach that attracts both tourists and locals.