的的喀喀湖（西班牙语：Titicaca）是南美洲最大的淡水湖泊，位于秘鲁和玻利维亚交界的安第斯山脉，湖面海拔高3812米，也是世界上海拔最高且大船可通航的高山湖泊。面积8290平方公里，平均水深140-180米，最深处达280米。湖中有51个岛屿，大部分有人居住，最大的岛屿的的喀喀岛上有印加时代的神庙遗址，也是印第安人的圣湖。的的喀喀湖的名称来源也许与当地的印地安语言有关，可能是“美洲豹的山崖”或者是“酋长的山崖”的意思。

Titicaca (in the hispanicized spelling) or Titiqaqa (Quechua) is a large, deep lake in the Andes on the border of Peru and Bolivia. By volume of water, it is the largest lake in South America. Lake Maracaibo has a larger surface area, though some consider it to be a large brackish bay due to its direct connection with the sea.