The Houjin River (Chinese: 後勁溪; pinyin: Hòujìn Xī) is a river in Nanzih District, Renwu District and Ciaotou District of Kaohsiung, Taiwan. The river has its source originated from Mount Guanyin in Dashe District. Once it reaches Bagualiao, the river passes through industrial areas.
Once it passes the factories, the river comes to the Shihlong Creek and Yuanjhonggang Creek water intake stations, which supply irrigation water for 1,390 hectares of farmland in Ciaotou and Yanchao District. After that, it passes through the fish-farming area in Ziguan District and finally into the sea of Taiwan Strait at the Yuanjhonggang Wetlands. The river is accessible within walking distance north east of Houjing Station of Kaohsiung MRT.