The Treaty of Lahore of 9 March 1846 was a peace-treaty marking the end of the First Anglo-Sikh War. The treaty was concluded, for the British, by the Governor-General Sir Henry Hardinge and two officers of the East India Company and, for the Sikhs, by the seven-year-old Maharaja Duleep Singh and seven members of Hazara, the territory to the south of the river Sutlej and the forts and territory in the Jalandhar Doab between the rivers Sutlej and Beas. In addition, controls were placed on the size of the Lahore army and thirty-six field guns were confiscated. The control of the rivers Sutlej and Beas and part of the Indus passed to the British, with the Provision that this was not to interfere with the passage of passenger boats owned by the Lahore Government. Also, provision was made for the separate sale of all the hilly regions between River Beas and Indus, including Kashmir, by the East India Company at a later date to Gulab Singh, the Raja of Jammu.

The first Anglo-Sikh war was fought between the Sikh Empire and the British East India Company in 1845 and 1846 around the Ferozepur district of Punjab. It resulted in defeat and partial subjugation of the Sikh empire and cession of Jammu & Kashmir as a separate princely state under British suzerainty.