Centre of Indian Trade Unions (Hindi: भारतीय ट्रेड यूनियन केन्द्र), CITU is a National level Trade Union in India politically attached to the Communist Party of India (Marxist). 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 and Kerala.