Tongzhi (Wade-Giles: T'ung-chih) can refer to:
- Tongzhi Emperor (1856–1875, reigned 1861–1875) of the Qing dynasty
- Tongzhi Restoration (c. 1860–1874), an attempt to strengthen the late Qing dynasty
- Tongzhi porcelain, a Chinese porcelain from Tongzhi Emperor's reign
- Tongzhi (encyclopedia), an 1161 Chinese encyclopaedia by Zheng Qiao
- Tongzhi (term), a term that could mean either "comrade" or "homosexual" in modern Chinese language
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