Loading…
The redrawing of constituency boundaries and reallocation of seats after a census, frozen in India on 1971 population figures until after 2026.
Delimitation is the process of fixing the boundaries of territorial constituencies and allocating seats among states in the Lok Sabha and state legislative assemblies. Articles 81 and 82 of the Constitution provide that this exercise follows every census and is based on the latest census figures. It is carried out by a Delimitation Commission constituted by an Act of Parliament, whose orders have the force of law and cannot be called into question before any court. In practice, however, the allocation of Lok Sabha seats among states has been frozen on the 1971 census since 1976, and successive amendments have extended that freeze.
Type: ProcessGoverned by Articles 81 and 82 of the Constitution
Carried out by a Delimitation Commission constituted under an Act of Parliament
The Commission's orders have the force of law and cannot be questioned in any court
Seat allocation among states has been frozen on the 1971 census since the 42nd Amendment of 1976
The 84th Amendment of 2001 extended the freeze until the first census after 2026
The 87th Amendment of 2003 allowed constituency boundaries to be redrawn on 2001 census figures without changing the number of seats per state
Frequency: Delimitation and the constitutional provisions on Lok Sabha composition appear regularly in UPSC Prelims and Mains polity
Article 81
Prescribes the composition of the Lok Sabha and the principle that seats be allotted to states in proportion to population, so far as practicable.
Article 82
Requires readjustment of seat allocation and constituency boundaries after every census, by an authority and in a manner determined by Parliament.
42nd Amendment Act, 1976
Froze the state-wise allocation of Lok Sabha seats on the basis of the 1971 census.
84th Amendment Act, 2001
Extended the freeze until the first census taken after the year 2026.
87th Amendment Act, 2003
Allowed constituency boundaries within states to be redrawn using 2001 census data, without changing the number of seats allotted to each state.
Delimitation Commissions were constituted in 1952, 1963, 1973 and 2002. The freeze introduced in 1976 was a deliberate political bargain: family planning had become a central policy goal, and states that succeeded in lowering their fertility rates stood to lose parliamentary seats to states that did not, since seats follow population. Freezing the allocation removed that penalty and reassured the southern states in particular. What began as a temporary measure has now lasted five decades, during which population growth has diverged sharply between north and south. The result is that constituencies vary enormously in size, and the value of a single vote differs substantially depending on where it is cast.
Delimitation Commissions constituted
42nd Amendment freezes state-wise seat allocation on the 1971 census
84th Amendment extends the freeze to the first census after 2026
87th Amendment permits boundary redrawing on 2001 figures without changing seat numbers
The Delimitation Bill, 2026, proposing 850 Lok Sabha seats, is introduced in the Lok Sabha; it becomes infructuous the following day
Delimitation is the point at which two constitutional principles collide. One person one vote requires that constituencies be roughly equal in population, which means reapportioning seats towards states whose populations have grown fastest. Federal balance requires that states which pursued national policy successfully, by reducing fertility, not be penalised with reduced representation for having done so. Any move to unfreeze the allocation would shift seats from the southern and western states towards the northern ones, which is why the question is treated as one of the most politically sensitive in Indian federalism. The Delimitation Bill of 2026 illustrates the point: it proposed enlarging the House to 850 seats, with 815 from states and 35 from Union Territories, on the basis of the 2011 census, but was introduced on 16 April 2026 and became infructuous the very next day without proceeding further. The 1971-based allocation therefore remains in force.
Delimitation: redrawing constituency boundaries and reallocating seats after a census
Governed by Articles 81 and 82; carried out by a Delimitation Commission
Commission orders have the force of law and cannot be questioned in court
42nd Amendment (1976) froze seat allocation on the 1971 census
84th Amendment (2001) extended the freeze to the first census after 2026
87th Amendment (2003) allowed boundary changes on 2001 data without seat changes
Commissions were set up in 1952, 1963, 1973 and 2002
Article 82 requires readjustment of seat allocation and constituency boundaries after every census, while Article 81 prescribes the composition of the Lok Sabha.
Until the first census taken after the year 2026, under the 84th Amendment of 2001. Note that the freeze runs to the first census after 2026, not to the year 2026 itself.
No. The orders have the force of law and cannot be called into question before any court, which is what allows the exercise to be completed without prolonged litigation.
Because seats follow population, states that successfully reduced their fertility rates under national family planning policy would have lost representation to states that did not. The freeze removed that penalty.