Centre of Indian Trade Unions, CITU is a National level Trade Union in India and its trade union wing is a spearhead of the Indian Trade Union Movement.[citation needed] The Centre of Indian Trade Unions is today one of biggest assembly of workers and classes of India. It has strong unchallangeable presence in the Indian state of Tripura besides a good presence in West Bengal, Kerala and Kanpur. They have an average presence in Tamil Nadu and Andhra Pradesh.