The stakes in India's delimitation debate
This is an explainer, taken from the author's introduction to a book on delimitation published by the paper. Delimitation means redrawing the boundaries of parliamentary constituencies and redistributing Lok Sabha seats among the States. The piece answers a set of practical questions: what triggers the next exercise, how the 2027 Census affects seat allocation, whether it can be finished before the 2029 election, and which States could gain or lose. Its central point is that a fresh delimitation needs no constitutional amendment at all — Articles 81 and 82 already require one once data from the first Census after 2026 is published, and an amendment is needed only to change those existing rules. The article then sets out the real tension underneath the debate: federalism, which represents States as units, against one person one vote one value, which says every citizen's vote should weigh the same.
Where this sits
- GS2Federalism — structure, issues and challenges pertaining to the federal structure; Centre-State relations
- GS2Parliament and State legislatures — structure, functioning, conduct of business
- GS2Salient features of the Representation of People's Act; electoral processes; women's reservation
- GS1Population and associated issues; effects of population change on representation
- EssayOne person one vote; balancing numbers and units in a federation
Points discussed
No amendment needed for delimitation
A fresh delimitation does not require a constitutional amendment. Articles 81 and 82 already provide that once data from the first Census after 2026 is published, the existing strength of the Lok Sabha is reallocated among States and Union Territories, and constituencies within each State are redrawn. An amendment is required only if those existing provisions are themselves to be changed.
What the Centre proposed
The proposals placed before Parliament in the previous Session were to increase the Lok Sabha to a maximum of 850 seats, to distribute those seats among States on the basis of the 2011 Census through a fresh countrywide delimitation, and to reserve one-third of the total seats for women. An amendment moved in April 2026 could not be passed, and the Centre has not revealed its exact current proposals.
The 2027 Census is the trigger
Under the existing provisions a fresh delimitation is possible only after the data of the 2027 Census is published, and women's reservation can be rolled out only along with it. The sequence envisaged is reallocation of seats among States, then delimitation of constituencies within States, then implementation of women's reservation — all tied to Census 2027.
Whether it can finish before 2029
It may or may not. The last Commission was set up on 12 July 2002 after the 2001 Census, its recommendations were implemented in 2008, and the 2009 election was fought on the new constituencies. The 2027 Census is the first with fully digitalised data gathering, so the process could in theory be quicker; if it is not completed by 2029 it can continue into the term of the next Lok Sabha.
Seats unchanged among States since 1973
The present distribution of 543 Lok Sabha seats among the States rests on the 1971 Census, and the last reallocation among States was in 1973. The exercise completed in 2008 redrew constituencies only within each State and moved no seat between them.
Southern States stand to lose share
When the benchmark changes from the 1971 population to the population recorded in the first Census after 2026, the southern States are likely to face a reduction in their share of Lok Sabha seats, while the Hindi-speaking States — particularly Uttar Pradesh, Bihar and Rajasthan — are likely to gain. The Constitution caps the Lok Sabha at 550 seats.
Why vote values now differ
In 1967 an MP across most major States represented roughly four to five lakh electors. Today an MP from Kerala represents about 14 lakh electors, while in Uttar Pradesh and Bihar the figure is around 19 lakh. This variation followed deliberate decisions taken by all parties in 1976 and again in 2001 not to punish States that had stabilised their populations.
Equal size is not equal value
Even when constituencies contain the same number of voters, the way those voters are grouped can dramatically affect outcomes. Spreading a party's supporters thinly across many seats is called cracking; concentrating them heavily into a few is called packing. Both can produce results that do not reflect overall vote share.
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