José de Santiago Concha y Salvatierra, 1st Marquess of Casa Concha (Lima, Peru, October 30, 1667[2] – Lima, Peru, March 11, 1741[3]) was a Spanish politician and Royal Governor of Chile.

He then returned to Lima to perform his old duties, until the King named him interim governor of Chile.

Santiago Concha arrived in Chile in Valparaiso on March 5, 1717,[7] and officially took power on the 20th of the same month.

[8] He took up a long-standing royal order to found settlements, with the goal of grouping inhabitants in determined areas.

Philip V granted him the title of Marquis of Casa Concha in 1718 in honor of his service to the crown.