The Renyitan Dam () is a dam in Fanlu Township, Chiayi County, Taiwan.
The dam was initially constructed in April 1980 on Renyi Lake and was opened in October 1987.
The water intake for the reservoir inside the dam comes from Bazhang River. The reservoir has a full capacity of 29,110,000 m<sup>3</sup> and an effective capacity of 27,310,000 m<sup>3</sup>. The reservoir maximum surface area is 2.32 km<sup>2</sup> with a maximum depth of 105 m.
The dam is accessible east from Chiayi Station of Taiwan Railway.