Delimitation is the redrawing of constituency boundaries, and the reallocation of seats between states, so that representation keeps pace with population. India has not done it fully since the 1970s, and that freeze is now expiring.
What a Delimitation Commission does
Article 82 provides that Parliament enacts a Delimitation Act after each census, after which the Central Government constitutes a Delimitation Commission. It redraws boundaries so constituencies hold broadly comparable populations, and fixes which seats are reserved for Scheduled Castes and Scheduled Tribes.
Its orders have the force of law and cannot be questioned in court, which is unusual and deliberate: boundary decisions are made final so that elections are not paralysed by litigation.
The freeze
The number of Lok Sabha seats allocated to each state has been frozen on 1971 census figures. The Constitution (Eighty-fourth Amendment) Act, 2001 and the Constitution (Eighty-seventh Amendment) Act, 2003 extended that freeze until the first census taken after 2026.
Boundaries within states were redrawn on 2001 census figures under the Delimitation Act, 2002, which is where the present constituencies come from. What did not change was how many seats each state gets.
Why it was frozen
Because seats follow population, and population growth has been uneven. States that reduced their birth rates fastest would have lost seats to states that did not, which would have meant penalising them for succeeding at national policy.
Freezing the allocation removed that penalty. It also means that after five decades, a seat in one state now represents a very different number of people from a seat in another.
Why it is live now
The freeze runs out with the first census after 2026, and legislation to govern the next delimitation has been brought before Parliament, including a Delimitation Bill and a constitutional amendment.
Even once a Commission is constituted, the process is slow: it must hold public hearings in every constituency, so completion within a single election cycle is not realistic.
Why it matters to you
Delimitation can change which constituency you are in, what it is called, who your sitting representative is, and whether the seat is reserved, without you moving house.
When it happens, re-check your entry rather than assuming last time’s details carry over.
Delimitation is not gerrymandering
The two get conflated. Gerrymandering is drawing boundaries to favour a party. Delimitation in India is carried out by an independent Commission chaired by a retired Supreme Court judge, with the Chief Election Commissioner and the State Election Commissioner as members, working to published population criteria and holding public hearings.
Associate members drawn from Parliament and the state Assembly sit with it, but they have no vote. The design is deliberate: the people with the strongest interest in the outcome can be heard and cannot decide.
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