Vellore district is one of the 38 districts in the Tamil Nadu state of India. It is one of the eleven districts that form the north region of Tamil Nadu. Vellore city is the headquarters of this district. As of 2011, the district had a population of 1,614,242 with a sex ratio of 1,007 females for every 1,000 males. In 2017 Vellore district ranked eleventh in list of districts in Ta…Vellore district is one of the 38 districts in the Tamil Nadu state of India. It is one of the eleven districts that form the north region of Tamil Nadu. Vellore city is the headquarters of this district. As of 2011, the district had a population of 1,614,242 with a sex ratio of 1,007 females for every 1,000 males. In 2017 Vellore district ranked eleventh in list of districts in Tamil Nadu by Human Development Index.