Pichincha is a province of Ecuador located in the northern sierra region; its capital and largest city is Quito. It is bordered by Imbabura & Esmeraldas to the north, Cotopaxi & Santo Domingo de los Tsa'chilas to the south, Napo & Sucumbi'os to the east, and Esmeraldas & Santo Domingo de los Tsa'chilas to the west.