Tienlun Dam (traditional Chinese: 天輪壩; simplified Chinese: 天轮坝; 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 m (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.

• List of power stations in Taiwan
• List of dams and reservoirs in Taiwan
• Electricity sector in Taiwan