Prayagraj, formerly known as Allahabad or Ilahabad, is a metropolis in the Indian state of Uttar Pradesh. It is the administrative headquarters of the Prayagraj district, the most populous district in the state and 13th most populous district in India and the Prayagraj division. The city is the judicial capital of Uttar Pradesh with the Allahabad High Court being the highest judicial body in the state. As of 2011, Prayagraj is the seventh most populous city in the state, thirteenth in Northern India and thirty-sixth in India, with an estimated population of 1.53 million in the city. In 2011, it was ranked the world's 40th fastest-growing city. The city, in 2016, was also ranked the third most liveable urban agglomeration in the state and sixteenth in the country. Hindi is the most widely spoken language in the city.

North India, also called Northern India, is a geographical and broad cultural region comprising the northern part of India wherein Indo-Aryans form the prominent majority population. It extends from the Himalayan mountain range in the north to the Indo-Gangetic plains, the Thar Desert, the Central Highlands and the northwestern part of the Deccan plateau. It occupies nearly three-quarters of the area and population of India and includes all of the three mega cities of India: Mumbai, Delhi and Kolkata. In a more specific and administrative sense, North India can also be used to denote the Indo-Gangetic Plain within this broader expanse, stretching from the Ganga-Yamuna Doab to the Thar Desert.