Dazhai or Tachai () is a village in Shanxi made famous in the "Learn from Dazhai in agriculture" campaign.
It may also refer to the following places in mainland China:
Towns (大寨镇) Dazhai, Qiaojia County, in Qiaojia County, Yunnan Dazhai, Yun County, Yunnan, in Yun County, Yunnan
Townships (大寨乡) Dazhai Township, Hua County, Henan Dazhai Township, Ziyun County, in Ziyun Miao and Buyei Autonomous County, Guizhou Dazhai Township, Tianquan County, in Tianquan County, Sichuan Dazhai Township, Jinping Miao, Yao, and Dai Autonomous County, in Jinping Miao, Yao, and Dai Autonomous County, Yunnan Dazhai Township, Qiaojia County, in Qiaojia County, Yunnan