Wushantou Reservoir (Chinese: 烏山頭水庫; pinyin: Wūshāntóu Shuǐkù), sometimes spelled Wushanto or Wusanto, is a reservoir and scenic area located in Lioujia District and Guantian District of Tainan, Taiwan.

The reservoir was designed by engineer Yoichi Hatta and was the largest in Asia at the time of its completion in 1930.

[1] Construction of the reservoir and of the Wusanto Dam used an uncommon semi-hydraulic fill technique, where fine-grained material is placed at the end of an embankment and then washed into its desired position using jets of water; this is a variant of the hydraulic fill technique.

This process was expensive and time-consuming, but produced a dam which has proven resistant to Taiwan's severe seismic activity.

[5] Today, the Wusanto Reservoir Scenic Area is a popular tourist destination in Tainan.