Vellore (vĕlôrˈ) [key], city (1991 pop. 310,776), Tamil Nadu state, SE India, on the Palar River. It is a district administrative center and an agricultural market town. In the 18th cent. Vellore was the stronghold of the Indian leaders Haidar Ali and his son Tippoo Sahib, and it was the site of a brief sepoy uprising against the British in 1806. An ancient fort, a 14th-century temple of the Hindu god Shiva, and a Christian medical college are in the city. Vellore has one of India's best hospital facilities.