New Delimitation Bill 2026: What it means and its key proposals

The government on Thursday tabled the Delimitation Bill in Parliament, triggering a sharp political backlash, particularly from opposition parties in southern states.

Under the proposal, states and union territories with a single Lok Sabha constituency will see no increase in parliamentary seats, even as their assembly strength expands. These include three northeastern states — Sikkim, Nagaland and Mizoram — along with six union territories. Meanwhile, states and UTs with an odd number of seats are expected to benefit, as their seat count would be rounded up after delimitation. In other states and UTs, the number of seats is proposed to increase by 50%. The exercise also includes a marginal increase in Scheduled Caste (SC) representation.

Read more: Amit Shah tables Delimitation Bill in Lok Sabha amidst nationwide protests by Opposition, southern states


The move has sparked strong reactions from leaders in the South. Politicians from Tamil Nadu, including Chief Minister M. K. Stalin and actor-politician Kamal Haasan, have raised concerns about the implications of the delimitation exercise scheduled for 2026. Critics argue that the process could reduce the region’s political influence in Parliament. Stalin, in a recent remark, even urged newlywed couples to plan families early, linking population trends to representation.

What is delimitation?



Delimitation is the process of redrawing constituencies for the Lok Sabha and state assemblies based on population. Using data from the latest census, each state is allocated seats in the House of the People and its legislative assembly. While constituencies may vary in geographical size, they are designed to have roughly equal population. Article 82 of the Constitution mandates that this exercise be carried out after every census.



Articles 82 and 170 of the Constitution mandate periodic revision of parliamentary and assembly constituencies based on the latest census. A Delimitation Commission, set up by Parliament, oversees the exercise. Since representation is tied to population, states with higher population growth stand to gain more seats, while those with slower growth may see their share decline.



India carried out delimitation exercises in 1951, 1961 and 1971. The process was frozen in 1976 through the 42nd Amendment to encourage population control and prevent states with higher growth rates from gaining disproportionate electoral advantage. The freeze was later extended in 2001 via the 84th Amendment, pushing the next exercise to 2026.

Expected impact of the upcoming exercise



The next round of delimitation is likely to be based on the 2031 Census, with discussions already underway ahead of the 2026 deadline. Projections suggest the number of Lok Sabha seats could rise from 543 to 753 if current population trends continue.

Southern states currently hold 129 of 543 Lok Sabha seats, a number projected to rise to 144 out of 753. However, their overall share is expected to decline from 23.7% to 19%. By contrast, northern states — which currently hold 222 seats — could see their tally jump to 357.

Region	State	Current Seats	Projected Seats (Post-Delimitation)
South	Telangana	17	20
South	Andhra Pradesh	25	28
South	Kerala	20	19
South	Tamil Nadu	39	41
South	Karnataka	28	36
North	Uttar Pradesh	80	128
North	Bihar	40	70
North	Madhya Pradesh	29	47
North	Maharashtra	48	68
North	Rajasthan	25	44

What are the key changes?The upcoming Lok Sabha delimitation is likely to be delinked from the 2011 Census, with the government, amid resistance from southern states, keen to retain the existing proportion of seats among states while expanding the overall strength of the House. At the same time, the exercise is expected to accommodate 33% reservation for women.

In effect, this could mean a uniform 50% increase in seats for each state. For instance, Uttar Pradesh’s representation could rise from 80 to 120 seats in an expanded Lok Sabha, of which 40 seats would align with the 33% quota for women. While the core exercise of redrawing constituency boundaries will continue, it will now be carried out with a significantly higher number of seats.



The bill circulated to lawmakers also introduces key changes to the existing framework.

Why are southern states opposing delimitation?

• Reduced political influence: The South’s share in Lok Sabha representation could drop from around 24% to 19%, while Hindi-speaking states may see an increase of nearly 60%.
• Economic contribution vs representation: States like Tamil Nadu, Karnataka and Maharashtra are among the highest contributors to the national exchequer but receive only about 30% in return. In contrast, states such as Bihar and Uttar Pradesh receive 250–350% more than their contribution, fuelling demands that economic output be factored into representation.
• Impact on reservations: The Women’s Reservation Act, which mandates 33% reservation for women in Parliament and state assemblies, will intersect with the delimitation process. Changes in SC/ST reserved seats will further add complexity to the exercise.