Vellore district is one of the 32 districts in the Tamil Nadu state of India. It is one of the biggest district in Tamil Nadu. Vellore City is the headquarters of this district. As of 2011, the district had a population of 3,936,331 with a sex ratio of 1,007 females for every 1,000 males.The Government of India recently included Vellore city into prestigious smart City project along with 26 more cities.