City (pop., 2001 prelim.: 2,207,340), capital of Uttar Pradesh state, northern India, on the Gomati River southeast of Delhi .
It was captured by the Mughal ruler Bābur in 1528 and under his grandson Akbar became part of Oudh province. In 1775 it became the capital of Oudh. It is now an important rail centre with paper factories and other industrial development. Notable sites include the Great Imambara (tomb) of one of the nabobs of Oudh, the Residency where the British were besieged during the Indian Mutiny of 1857, and the University of Lucknow.