佩滕伊察湖（西班牙语：Lago Petén Itzá）也作佩藤伊扎湖、佩腾湖，位于危地马拉北部佩滕省境内，首都危地马拉市东北260公里处。地处海拔80米的石灰岩高原上，东西长约35公里，南北宽约16公里，湖深50米，面积100平方公里。湖水通过地下出流。原为伊察人居住地，1697年被西班牙征服。沿岸主要城市为弗洛雷斯（佩滕省省会）、圣贝尼托、圣安德烈斯等。沿岸大部分为热带雨林，弗洛雷斯周围种植有可可、甘蔗、谷物和热带水果。

Lake Petén Itzá (Lago Petén Itzá, Spanish pronunciation: [ˈlaɣo peˈten iˈtsa]) is a lake in the northern Petén Department in Guatemala. It is the second largest lake in Guatemala, after the Izabal Lake. It is located around 16°59′0″N 89°48′0″W / 16.98333°N 89.80000°W / 16.98333; -89.80000. It has an area of 99 km² some 32 km. long and 5 km wide. Its maximum depth is 160 m. The lake area presents high levels of migration, due to the existence of natural resources such as wood, chewing gum, oil, and agricultural and pasture activities. Because of its archaeological richness, around 150,000 tourists pass through this region yearly. The city of Flores, the capital of El Petén, lies on an island near its southern shore.