Villupuram is an administrative district in the state of Tamil Nadu in India. The district headquarters are located at Villupuram. The district occupies an area of 7217 km² and has a population of 2,943,917 (as of 2001). Districts are a form of local government in several countries. ... Tamil Nadu (தமிழ் நாடு, Land of the Tamils) is a state at the southern tip of India. ... The Republic of India is the second most populous country in the world, with a population of more than one billion, and is the seventh largest country by geographical area. ... This article explains the meaning of area as a physical quantity. ... Square kilometre (US spelling: Square kilometer), symbol km², is an SI unit of surface area. ... In the most common sense of the word, a population is the collection of people—or organisms of a particular species—living in a given geographic area. ...