Bou Sra Waterfall is a waterfall in Mondulkiri Province in Cambodia. It is located in Pechr Chenda District 43 kilometres from the provincial town of Mondulkiri along a red soil road.

In its first stage the waterfall has 15m diameter and 15-20m height during the rainy season, and a 20m diameter and 18-25m height in dry season.

The second stage of waterfall lies 150 metres from the first stage. During the dry season it has a 23m diameter and a 15-20m height and during the rainy season has 20m diameter and 18-25m height. [1]

At the third stage, the waterfall is more powerful than at the second stage, but it cannot be reached by man due to geographical obstructions.