The Da'an River (Chinese: 大安溪; pinyin: Dà'ān Xī) is a river in northwestern Taiwan.

It is the seventh-longest river on the island, it flows through Miaoli County and Taichung City for 105 kilometres (65 mi).

[1][2] The Da'an River was affected by the 1999 Jiji earthquake, where a gorge was formed (called Da'an River Grand Canyon Chinese: 大安溪大峽谷).

In some of the fastest erosion geologists have ever seen, the gorge is being eaten away from its upstream end at a rate of 17 meters per year.

This article related to a river in Taiwan is a stub.