Tienlun Dam (Chinese: 天輪壩; pinyin: Tiānlún Bà) is a concrete gravity dam on the Dajia River in Heping District, Taichung, Taiwan. Built from 1952 to 1956, the dam is the fourth in a cascade of hydroelectric dams along the Dajia River, located upstream from the Ma'an Dam and downstream of the Kukuan Dam.
The dam is 48.2 m (158 ft) high and 91 m (299 ft) long, with a storage capacity of 590,000 m3 (480 acre·ft) of water. It supplies water to a power station consisting of one 105 megawatt (MW) turbine and four 22.5 MW turbines for a capacity of 195 MW, generating 557 million kilowatt hours per year.
Coordinates: 24°12′38.44″N 121°00′56.9″E / 24.2106778°N 121.015806°E