Sayyid Ali bin Said al-Busaidi, GCSI, (c. 1854 – March 5, 1893) (Arabic: علي بن سعيد البوسعيد) was the fourth Sultan of Zanzibar.

He ruled Zanzibar from February 13, 1890, to March 5, 1893.

In June 1890 he was forced to accept a British protectorate over his dominions.

[1] He was succeeded by his nephew, Hamad bin Thuwaini Al-Busaid.

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