Indira Gandhi National Open University, known as IGNOU, is a public distance learning university located in New Delhi, India. Named after the former Prime Minister of India Indira Gandhi, the university was established in 1985 with a budget of ₹20 million, after the Parliament of India passed the Indira Gandhi National Open University Act, 1985. IGNOU is run by the central government of India, and with a total active enrollment of over 4 million students, it is the largest university in the world.

A public university or public college is a university or college that is owned by the state or receives significant funding from a government. Whether a national university is considered public varies from one country to another, largely depending on the specific education landscape. In contrast a private university is usually owned and operated by a private corporation. Both types are often regulated, but to varying degrees, by the government.