Santiago Metro Line 1 is the oldest of the seven existing rapid transit lines that make up the Santiago Metro system. Being its busiest, it has a total of 27 stations along its 19.3 km (12.0 mi) length, constructed almost entirely underground, and is located primarily along the axis formed by the Avenida Libertador General Bernardo O'Higgins, Providencia Avenue and Apoquindo Avenue.

The Santiago Metro is a rapid transit system serving the city of Santiago, the capital of Chile. It currently consists of seven lines, 143 stations, and 149 kilometres (92.6 mi) of revenue route. The system is managed by the state-owned Metro S.A. and is the first and only rapid transit system in the country.