It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean.

• 北与厄瓜多尔、哥伦比亚接壤，东与巴西交界，东南与玻利维亚毗邻，南靠智利，西濒太平洋。