Loncoche (Mapudungun for "head of an important person") is a city and commune in Cautín Province in the Araucanía Region, southern Chile.

Pablo Neruda wrote a poem called "Aromos rubios en los campos de Loncoche".

According to the 2002 census of the National Statistics Institute, Loncoche spans an area of 976.8 km2 (377 sq mi) and has 23,037 inhabitants (11,499 men and 11,538 women).

[3] As a commune, Loncoche is a third-level administrative division of Chile administered by a municipal council, headed by an alcalde who is directly elected every four years.

The commune is represented in the Senate by José Garcia Ruminot (RN) and Eugenio Tuma Zedan (PPD) as part of the 15th senatorial constituency (Araucanía-South).