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The West Bengal National University of Juridical Sciences (WBNUJS or NUJS) is an autonomous law university established in 1999, offering courses at the undergraduate and postgraduate levels. It is in Salt Lake City of Kolkata, West Bengal, India.

The university offers a five-year integrated B.A./BSc. LLB (Hons.) degree programme at the undergraduate level and a Master of Laws (LLM) programme at the postgraduate level. Admission to the former programme is through the Common Law Admission Test, a highly competitive, nationwide common entrance examination, held jointly by fourteen of the seventeen national law schools. NUJS also offers MPhil, PhD and diploma in business laws and other programs. It also offers a number of online courses that attract students from 17 countries across the world so far.

NUJS was established in 1999 by the Bar Council of India, in conjunction with the government of West Bengal. The Founder-Vice-Chancellor was Professor N.R. Madhava Menon, a former Professor of law of Delhi University and Founder-Director, National Law School of India University (NLSIU), Bangalore, who is credited with revolutionising the field of legal education in India, by starting the concept of "national law schools", as opposed to the traditional law colleges prevalent before.

The NUJS, Kolkata, along with the GNLU and NLSIU, Bengaluru, remain the only three national law schools which have the honourable Chief Justice of India as the Chancellor. This set-up provides an aura of exclusivity and rare stature to these National Law Schools in India. It may be noted that all other National Law Schools have the Chief Justice of the respective state High Courts as their Chancellors.

The university was the brainchild of then Chief Minister Jyoti Basu. Other eminent personalities without whose help and active intervention the university could not have been founded, include Sh. Jyoti Basu, a former Chief Minister of West Bengal who was a Middle Temple barrister;Sh. Somnath Chatterjee, a former Speaker of the Lok Sabha, also a Middle Temple barrister and a leading member of the Calcutta Bar Library; and Justice Chittotosh Mookerjee, a former Chief Justice of the Calcutta High Court and the Bombay High Court and the (Acting) Governor of Maharashtra. Justice Mookerjee was the university's Honorary Treasurer and has been associated with the work of the university since its inception in 1999. The NUJS is an autonomous university.

Initially, classes, which started in 2000, were held at Aranya Bhavan, where the Environment Ministry of the government of West Bengal is located, and the first batches of students started living in government flats. On 28 October 2002, the university's present-day permanent campus was inaugurated by the then Chief Justice of India, B. N. Kirpal. In 2006, NUJS was allotted a 50-acre (200,000 m2) plot in Rajarhat, an upscale township, which is being developed by the West Bengal government.