Delimitation and Representation: Why Boundaries Matter

Delimitation is the redrawing of constituency boundaries so that each elected representative speaks for a roughly equal number of people. Without it, population shifts would leave some constituencies far larger than others, and a vote in a fast-growing area would count for less than a vote in a shrinking one. In India, delimitation is carried out by an independent Delimitation Commission, whose orders have the force of law. It adjusts boundaries within states and, in a full exercise, the allocation of seats between states.

India's history makes this unusually sensitive. The total number of Lok Sabha seats allocated to each state has been frozen on the basis of the 1971 Census: first by the 42nd Amendment of 1976, and then extended by the 84th Amendment of 2001 until after the first census after 2026. The reason was fairness of a different kind — states that successfully slowed population growth, many of them in the south, should not lose seats and political weight for doing so. A later exercise in 2002 redrew boundaries within states using 2001 Census data, but it did not change how many seats each state received.

That freeze runs until the first census after 2026 is published, so it is now approaching the point at which it can change, and the next delimitation is therefore one of the most consequential decisions in Indian democracy. If seats were simply reallocated by current population, states with faster population growth would gain seats and slower-growing states would lose relative weight, even though their populations have also grown in absolute terms. If, instead, the total number of seats is expanded while keeping states' relative shares broadly stable — an approach in delimitation bills introduced in the Lok Sabha in April 2026, including the Constitution (131st Amendment) Bill, 2026 — slower-growing states would keep their share but the House would become much larger. Those 2026 bills had not been presented here as settled law, because their final form and passage were still under discussion at the time of writing. The debate also links to women's reservation, which is tied in law to delimitation following a census. Whichever path is chosen, delimitation will reshape who is represented, which regions carry weight, and how parties campaign.

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