Juan Luis Sanfuentes Andonaegui (Latin American Spanish: [xwan lwis saɱˈfwentes]; 27 December 1858 – 16 July 1930) was President of Chile between 1915 and 1920.

Orphaned at an early age and raised by his older brother, Enrique Salvador Sanfuentes, he trained as a lawyer at the University of Chile.

[1] Rising to the position of Minister of Finance under Federico Errázuriz Echaurren in 1901, Sanfuentes served as President of the Senate of Chile from 1906 through 1909.

But the end of the war led to a crisis of the nitrate industry, which resulted in a wave of social unrest.

Sanfuentes' hard line against striking coal miners and trade unionists in the final year of his presidency was a key factor in the rise of his liberal reformer successor.