Yishan (Manchu official)

Yishan (Manchu: I Šan; ; ?-1878) was a Manchu official and member of the imperial clan of the Qing Dynasty. Yishan belonged to the Bordered Blue Banner of the Eight Banners and was a great-great-grandson of Yinti, who was outmaneuvered by the Yongzheng Emperor. He held a number of military posts in the Qing government.

Yishan is known for his role commanding troops during the First Opium War and his failure to defend Guangzhou against British troops. He also signed the Treaty of Kuldja and the Treaty of Aigun with Russia in 1851 and 1858 respectively. His signature on the latter treaty earned him the disapproval of the Xianfeng Emperor, who dismissed him from office.