1840 in China
Events from the year 1840 in China.
Incumbents
Viceroys
- Viceroy of Zhili — Qishan then Nergingge
- Viceroy of Min-Zhe — Deng Tingzhen then Yan Botao
- Viceroy of Huguang — Yutai
- Viceroy of Shaan-Gan — Hūsungge then Nergingge then Hūsungge then Enteheng'e
- Viceroy of Liangguang — Deng Tingzhen then Lin Zexu then Yiliang then Qishan
- Viceroy of Yun-Gui — Guiliang
- Viceroy of Sichuan — Gioro-Baoxing
- Viceroy of Liangjiang — Chen Luan then Deng Tingzhen then IIibu