Fuxian Lake, Freshwater lake in Yunnan Province, China.

Fuxian Lake is a north–south fault lake in Yunnan shaped like an inverted gourd, wide and deep in the north and narrow and shallow in the south. It lies at 1,721 m, covers 211–212 km² and reaches 155 m deep, with water clarity of 7–8 m. Its only island, Gushan, sits in the southern Jiangchuan waters.

Around the early 2000s, divers discovered submerged structures beneath the lake that are hundreds of years old. These findings suggest a human settlement once existed at this location.

The lake's name changed over time: Tang-era texts called it Dachi, later it was known as Qingyu Xiyue Hu, and it took the name Fuxian in the Ming dynasty. The endemic fish Kanggulang (an endemic cyprinid) is a noted local specialty, and the Jieyu Stone in the Yudai River is said to mark the boundary that keeps Xingyun Lake's fish and Fuxian's apart.

The best way to explore the shoreline is by renting a car or using local buses that connect various villages around it. Most visitors come during spring through fall when the weather is mild and rainfall is lighter.

In 1987 the early-Cambrian arthropod Fuxianhuia was discovered at the lake and named after it; the fossil is central to debates on early arthropod evolution. The lake also gave its name to Dyrithiopsis lakefuxianensis, a fungus found growing on submerged wood.