The first digital census
Enumerators carry a secure offline mobile app on Android and iOS, in 16 regional languages, transmitting field data straight to the server. No paper schedules to key in afterwards.
Phase 1 under way
Census 2027: India counts itself again — this time on a phone.
Census 2027 is India’s 16th census and the first conducted by digital means. It runs in two phases — house-listing between April and September 2026, population enumeration in February 2027 — against a reference date of 00:00 hours on 1 March 2027. For the first time since 1931, it will also count caste. House-listing is running across the States and Union Territories through 30 September 2026. Population Enumeration follows in February 2027.
- 1 Mar 2027
- Reference date — the Census Moment
- Two phases
- House-listing 2026, population enumeration 2027
- Since 1931
- First census to enumerate caste in full
- 16 languages
- Mobile app and the self-enumeration portal
At a glance
Census 2027 in nine facts.
The dates, the legal basis and the numbers that every other question about this census hangs off.
- Which census
- 16th overallThe 8th since Independence. The 2021 round was postponed after the COVID-19 outbreak, so this is the next in the decennial series.
- Reference date
- 1 March 2027The “Census Moment” is 00:00 hours on 1 March 2027 — the instant that decides who is counted where.
- Snow-bound areas
- 1 October 2026Ladakh and the non-synchronous snow-bound areas of Jammu & Kashmir, Himachal Pradesh and Uttarakhand run early, with Phase 2 in September 2026.
- Phase 1 · Houselisting
- April–Sept 2026A 30-day window chosen by each State/UT, preceded by a 15-day optional self-enumeration period.
- Phase 2 · Population
- February 2027Demographic, socio-economic, cultural, migration and fertility detail — and the caste column.
- Caste enumeration
- First since 1931Every census up to 2011 counted only Scheduled Castes and Scheduled Tribes. The CCPA decision of 30 April 2025 added full caste enumeration.
- Legal basis
- Census Act, 1948Read with the Census Rules, 1990. Census is a Union subject — entry 69 of the Union List in the Seventh Schedule.
- Outlay
- ₹11,718.24 croreApproved by the Union Cabinet for the conduct of Census 2027.
- Field workforce
- ~31 lakhEnumerators and supervisors, plus over 1 lakh census functionaries and about 18,600 technical staff.
Where it stands
From the Cabinet decision to the Census Moment.
Ten dates that define the operation. Everything above the gold marker has already happened.
30 Apr 2025
Caste enumeration approved
The Cabinet Committee on Political Affairs decides that caste will be enumerated in Census 2027 — the first full caste count since 1931.
16 Jun 2025
Intent notified in the Gazette
The Government notifies its intent to conduct the census under Section 3 of the Census Act, 1948, fixing the reference dates.
Nov 2025
Nationwide pre-test
About 5,000 census blocks are pre-tested to validate the methodology, the digital tools and the training system.
1 Jan 2026
Administrative units frozen
District, sub-district and village boundaries are frozen so the enumeration frame stays stable through both phases.
Jan 2026
Houselisting questions notified
The schedule of questions for Phase 1 is notified, covering building type, amenities and household assets.
1 Apr 2026
Phase 1 begins
House-listing and self-enumeration open. Each State and UT takes a 30-day field window of its own choosing.
30 Sep 2026
Phase 1 closes
House-listing completes nationwide, producing the frame of households that Phase 2 will enumerate.
Sep–Oct 2026
Snow-bound enumeration
Ladakh and the snow-bound tracts of J&K, Himachal and Uttarakhand take Phase 2 early, against a 1 October 2026 reference date.
Feb 2027
Phase 2 · Population Enumeration
The full population count, including the caste column. Exact dates and the question schedule are to be notified.
1 Mar 2027
The Census Moment
00:00 hours. Every person is counted as of this instant, wherever they were.
What’s new this round
Five things Census 2027 does that no Indian census has done before.
Caste, counted in full
Beyond the Scheduled Caste and Scheduled Tribe columns that every census since 1951 has carried, Census 2027 records caste itself — last attempted comprehensively in 1931.
Self-enumeration
For the first time a household can fill its own return online at se.census.gov.in during a 15-day window, get a Self-Enumeration ID, and hand that ID to the enumerator for confirmation.
Near real-time monitoring
The Census Management & Monitoring System (CMMS) gives officers at sub-district, district, State and national level a live dashboard of field progress rather than a post-hoc report.
Geo-referenced frame
Buildings are geo-tagged and each structure gets a unique identification number, so the household frame is spatially anchored instead of resting on written descriptions.
Phase 1 · April–September 2026
Houselisting: building the frame before counting the people.
The Houselisting and Housing Census does not count people. It counts structures — every building, whether a home, a shop or a shed — and records the condition of the dwelling, the amenities the household has, and the assets it owns. Each structure is geo-tagged and given a unique identification number.
That output is the reason Phase 1 exists. It produces the frame: a verified, spatially anchored list of every household in the country, which Phase 2 then works through person by person. A census that skipped this step would have no reliable way of knowing which doors it had failed to knock on.
Each State and Union Territory picks its own 30-day window inside the April–September span, so the operation rolls across the country rather than happening everywhere at once. The schedule of questions for this phase was notified in January 2026.
Immediately before house-to-house work starts in a State, a 15-day self-enumeration window opens. Tamil Nadu’s rollout of that facility is covered in detail in our note on digital self-enumeration in Tamil Nadu.
How self-enumeration works
- Open the portal at se.census.gov.in during your State’s 15-day window.
- Fill the household return yourself, in any of 16 languages — Assamese, Bengali, English, Gujarati, Hindi, Kannada, Konkani, Malayalam, Manipuri, Marathi, Nepali, Odia, Punjabi, Tamil, Telugu and Urdu.
- On submission the portal issues a unique Self-Enumeration ID (SE ID).
- Hand that SE ID to the enumerator when they visit. They confirm your entry instead of recording it afresh.
- Tool tips, a user guide, a tutorial video and validation checks sit inside the portal to keep the data clean.
Phase 2 · February 2027
Population Enumeration and the Census Moment.
Phase 2 is the census proper. Working through the frame Phase 1 built, enumerators record demographic, socio-economic, cultural, migration and fertility detail for every individual — and, this time, caste.
Everything is pinned to a single instant. The reference date, or Census Moment, is 00:00 hours on 1 March 2027. A child born at 00:01 on 1 March is not counted; a person who dies at 23:59 on 28 February is not counted either. Fixing one instant is what stops the same person being enumerated twice in two places, and it is the reason a census is described as synchronous.
Not everywhere can be synchronous. Ladakh and the non-synchronous snow-bound areas of Jammu & Kashmir, Himachal Pradesh and Uttarakhand are enumerated early — in September 2026, against a reference date of 00:00 hours on 1 October 2026 — because those areas are cut off by snow in February. India has handled these tracts this way for decades; the 2011 census did the same thing in September 2010.
The exact dates for Phase 2 and its schedule of questions are still to be notified.
What Phase 2 records
- Demographic — age, sex, marital status, relationship to head of household.
- Socio-economic — literacy, education, work status and category of worker.
- Cultural — religion, mother tongue and other languages known.
- Caste — recorded for the first time in full since 1931, alongside the existing SC and ST columns.
- Migration — place of birth, place of last residence and reason for moving.
- Fertility — children ever born and surviving, a key input for population projections.
The caste column
The first full caste count in 96 years.
Every Indian census from 1951 to 2011 enumerated only Scheduled Castes and Scheduled Tribes. Caste beyond those two constitutionally listed categories was last counted comprehensively in 1931. That single fact has shaped Indian policy ever since: the Mandal Commission’s estimate that OBCs formed 52% of the population was extrapolated from 1931 data, because nothing newer existed.
The Cabinet Committee on Political Affairs decided on 30 April 2025 that caste would be enumerated in Census 2027, and it will be recorded during Phase 2.
The hard part is not the decision but the design. India has no settled national list of castes; jati names vary by region, spelling and self-description, and the same community may be classified differently across State lists. The ‘open column’ method tested during the rehearsal — where a respondent states their caste in free text rather than picking from a dropdown — is the attempt to handle that, and it shifts the difficulty from collection to classification afterwards.
It is worth being precise about what this is not. The Socio Economic and Caste Census of 2011 was an executive exercise conducted outside the Census Act, aimed at identifying households for benefit targeting; its caste data was never fully released because the returns threw up lakhs of unclassifiable entries. Census 2027’s caste data will carry the statutory backing of the Census Act, 1948 — which the SECC never had. Our full explainer on the caste census works through that distinction and the Article 340 framework.
The consequence
Why this census decides the shape of the next Lok Sabha.
Census 2027 is not only a statistical exercise. Two constitutional clocks are wired to it.
Article 82 requires the allocation of Lok Sabha seats to be readjusted after every census. The 84th Amendment (2001) froze that allocation on the 1971 population figures until the first census taken after 2026 — and Census 2027 is that census. When its figures are published, the constitutional basis for the freeze falls away.
That matters because population growth has diverged sharply across India. States that reduced fertility fastest — largely in the south — would lose relative weight in a purely population-based readjustment, while the northern States would gain. This is the substance of the north–south representation debate: one-person-one-vote against the promise made to States that met national population-control goals.
The second clock is women’s reservation. The 106th Amendment (2023) reserves one-third of seats in the Lok Sabha and State Assemblies for women, but Article 334A makes it effective only after a delimitation carried out on the basis of the first census after the amendment’s commencement. No Census 2027, no delimitation; no delimitation, no women’s reservation.
Parliament tried to cut that knot and failed. The Constitution (131st Amendment) Bill, 2026 was introduced in the Lok Sabha on 16 April 2026 and negatived the following day, on 17 April 2026, taking 298 votes against the 352 needed for a two-thirds majority — 54 short. It would have raised the Lok Sabha ceiling from 550 to 850 seats and allowed delimitation and women’s reservation to proceed on 2011 census data. Its companion Delimitation Bill, 2026 and Union Territories Laws (Amendment) Bill, 2026 did not proceed either.
With that route closed, the sequence reverts to the constitutional default: Census 2027 first, then delimitation, then women’s reservation.
The chain, in order
- Article 82 — seats readjusted after every census.
- 84th Amendment, 2001 — allocation frozen on 1971 figures until the first census after 2026.
- Census 2027 — that census. Its publication removes the basis for the freeze.
- Delimitation Commission — constituted by Parliament to redraw boundaries and reallocate seats.
- 106th Amendment, 2023 (Article 334A) — women’s reservation takes effect after that delimitation.
- 131st Amendment Bill, 2026 — attempted to short-circuit the chain using 2011 data; negatived on 17 April 2026.
Law and institutions
Who runs the census, and what protects your answers.
The census is conducted under the Census Act, 1948, read with the Census Rules, 1990. It is a Union subject — entry 69 of the Union List in the Seventh Schedule — so it is centrally coordinated by the Office of the Registrar General & Census Commissioner, India under the Ministry of Home Affairs, while being executed in collaboration with State and UT governments.
Section 3 of the Act is the provision under which the Government notifies its intent to take a census; that notification was published in the Gazette on 16 June 2025.
Section 15 is the one that matters to a respondent. It makes individual returns strictly confidential: they cannot be released under the Right to Information Act, are not admissible as evidence in any court, and are used only to produce aggregate statistics. An enumerator’s record of your household is not a document any authority can pull to act against you.
Because Census 2027 is digital, that legal protection is now backed by a technical one: end-to-end encryption across collection, transmission and storage; hosting on data centres designated Critical Information Infrastructure; and compliance with ISO/IEC 27001:2022 with regular third-party security audits.
Scale of the operation
- ₹11,718.24 crore approved outlay.
- ~31 lakh enumerators and supervisors mobilised.
- 1 lakh+ census functionaries, plus about 18,600 technical staff for roughly 550 days — around 1.02 crore man-days of employment.
- 80,000+ training batches per phase.
- 19 languages for the instruction manuals; 16 for the app and portal.
- ~5,000 census blocks covered in the November 2025 pre-test.
- 1 January 2026 — administrative boundaries frozen to keep the frame stable.
The long series
1872 to 2027: an unbroken run, broken once.
The idea is older than the British administration that formalised it. Kautilya’s Arthashastra (321–296 BC) describes population records kept for taxation, and Abul Fazl’s Ain-i-Akbari documents similar practice under Akbar.
The first modern census was conducted between 1865 and 1872 — usually cited as 1872, and usually described as the “first” census of India, though it was non-synchronous: different provinces counted at different times, so the totals never referred to a single moment. The first synchronous census came in 1881, and every census since has followed that model at ten-year intervals. Our note on the first census in India works through why that distinction is tested so often.
That decennial run held for 140 years. It broke in 2021: all preparations were complete and Phase 1 field work was to begin in some States from 1 April 2020, but the exercise was postponed when COVID-19 arrived. The consequence is that India has been governing, allocating and planning on 2011 data ever since — which is why almost every argument about Indian demography in the last few years has come with an asterisk.
Census 2027 is therefore the 16th census overall and the 8th since Independence, and the first for which the gap from its predecessor is sixteen years rather than ten. The full decennial series is set out here.
Latest developments
Census 2027 in the news.
Our current-affairs coverage of the census, its caste column and the delimitation question, newest first.
20 Aug 2026
Census 2027: Disability rights groups flag gaps in disability categories
Context: Disability-rights organisations have questioned the proposed nine-category framework for recording disability in Census 2027. They argue that it may not adequately…
Read the note →19 Aug 2026Census 2027 Population Enumeration: Parental Data and New Fields
Why in News? The Hindu reports that the Census 2027 population-enumeration schedule went live on 17 August 2026 in Ladakh and snow-bound…
Read the note →18 Jul 2026Census 2027: Tamil Nadu Opens Digital Self-Enumeration
Why in News? Tamil Nadu opened the optional online self-enumeration window for the first phase of Census 2027 on 17 July 2026.…
Read the note →15 Jul 2026Ravidassia Religion and Census Recognition: Identity, Data and Constitutional Questions
Why in News? The Indian Express reported in July 2026 that Ravidassia representatives had renewed their demand for a separate religion category…
Read the note →7 Jul 2026Census 2027 Caste Enumeration: ‘Open Column’ Method Tested in Rehearsal
Why in News? The Hindu reported that the rehearsal for the second phase of Census 2027 — Population Enumeration (PE) — began…
Read the note →2 Jul 2026Census 2027: Houselisting and Demography Questions
Why in News? The Hindu reported on 2 July 2026 that enumerators had begun door-to-door visits in Kerala for the Houselisting phase…
Read the note →Go deeper
The rest of the census syllabus.
This page covers Census 2027 as an operation. These cover the concepts around it.
First census in IndiaWhy 1872 was first but not synchronous, and how 1881 under Lord Ripon set the decennial pattern.Read →Indian census historyThe full decennial series from 1881 to the deferred 2021 round and on to 2027.Read →Caste census explainedCensus versus SECC, the Article 340 framework, and why the 1931 reset still governs the debate.Read →Census of India: data notesCensus 2011 findings, the Registrar General’s office, and how census data drives governance.Read →Delimitation in IndiaThe constitutional freeze, the Delimitation Commission, and the southern states’ objection.Read →Sex ratio in IndiaWhat the census measures, the state-wise picture and the causes behind the trend.Read →
UPSC relevance
What the exam actually asks about the census.
Census sits across GS I (population and society), GS II (constitutional provisions, government policies) and the Essay paper. The factual traps are consistent year to year.
Prelims: the facts that get tested
- 1872 vs 1881. 1872 was the first census but non-synchronous; 1881, under Viceroy Lord Ripon, was the first synchronous one. Questions exploit exactly this gap.
- Reference date. 00:00 hours, 1 March 2027 — and 1 October 2026 for Ladakh and the snow-bound tracts of J&K, Himachal and Uttarakhand.
- Legal basis. Census Act, 1948 and Census Rules, 1990. Union List entry 69. Section 15 governs confidentiality.
- Caste. Only SCs and STs were enumerated from 1951 to 2011. The last full caste count was 1931.
- Census vs SECC. The SECC 2011 sat outside the Census Act and its caste data was never fully released.
- Constitutional chain. Article 82, the 84th Amendment freeze, Article 334A and the 106th Amendment.
Mains: questions worth practising
- Census 2027 will enumerate caste for the first time since 1931. Examine the arguments for and against collecting caste data through the Census rather than a separate survey. (GS I, 250 words)
- “Delimitation on the basis of Census 2027 pits the principle of one-person-one-vote against the promise of federal fairness.” Critically examine. (GS II, 250 words)
- Discuss how a sixteen-year gap in census data has affected the targeting of welfare entitlements in India. (GS II, 150 words)
- Evaluate the opportunities and the risks of conducting India’s first digital census, with reference to data security and coverage of vulnerable groups. (GS III, 250 words)
- What is meant by a synchronous census, and why does India enumerate certain areas non-synchronously? (GS I, 150 words)
Figures on this page are drawn from the Ministry of Home Affairs and the Office of the Registrar General & Census Commissioner — the Press Information Bureau release of 4 June 2025 on the two-phase schedule, and the PIB backgrounder of 25 April 2026 on Census 2027 as India’s first digital enumeration. Phase 2 dates and its question schedule are still to be notified; this page is updated as they are.
Questions
Census 2027, answered.
When will Census 2027 be conducted?
Census 2027 runs in two phases. Phase 1, the Houselisting and Housing Census, runs between April and September 2026, with each State and Union Territory taking a 30-day field window of its own choosing. Phase 2, Population Enumeration, is scheduled for February 2027. The reference date is 00:00 hours on 1 March 2027 for most of the country.
What is the reference date, or Census Moment, for Census 2027?
The reference date is 00:00 hours on the first day of March 2027. For the Union Territory of Ladakh and the non-synchronous snow-bound areas of Jammu & Kashmir, Himachal Pradesh and Uttarakhand, it is 00:00 hours on 1 October 2026. The reference date, also called the Census Moment, is what tells an enumerator which persons to include and where.
Will Census 2027 count caste?
Yes. The Cabinet Committee on Political Affairs decided on 30 April 2025 that caste would be enumerated in Census 2027, and it will be recorded during the Phase 2 Population Enumeration. Every census from 1951 to 2011 enumerated only Scheduled Castes and Scheduled Tribes, so this is the first comprehensive caste count since 1931.
What is self-enumeration and how does it work?
Self-enumeration lets a household fill in its own census return online instead of waiting for the enumerator to ask. It runs on the portal at se.census.gov.in during a 15-day window immediately before house-to-house work begins in that State, is available in 16 languages, and issues a unique Self-Enumeration ID on submission. You share that SE ID with the enumerator when they visit, and they confirm the entry rather than recording it afresh.
Why is Census 2027 called India's first digital census?
Because the data is collected on a mobile application rather than paper schedules. Enumerators use a secure offline app on Android or iOS in 16 regional languages that transmits directly to the server, buildings are geo-tagged with a unique identification number, progress is tracked live on the Census Management & Monitoring System portal, and households can self-enumerate online.
Which law governs the census in India?
The Census Act, 1948, read with the Census Rules, 1990. Census is a Union subject at entry 69 of the Union List in the Seventh Schedule. Section 15 of the Act makes individual returns strictly confidential: they cannot be released under the Right to Information Act, are not admissible as evidence in any court, and are used only to produce aggregate statistics.
How is Census 2027 linked to delimitation and women's reservation?
Article 82 requires seats to be readjusted after each census, but the 84th Amendment (2001) froze allocation on the 1971 population until the first census taken after 2026 — which is Census 2027. The 106th Amendment (2023) then made the 33% reservation for women in the Lok Sabha and State Assemblies effective only after a delimitation carried out on the basis of the first census after its commencement. Census 2027 is therefore the trigger for both.
What happened to the Constitution (131st Amendment) Bill, 2026?
It was introduced in the Lok Sabha on 16 April 2026 and negatived the next day, on 17 April 2026, after securing 298 votes against the 352 needed for the two-thirds majority a constitutional amendment requires. The Bill would have raised the Lok Sabha ceiling from 550 to 850 seats and allowed delimitation and women's reservation to proceed on 2011 census data instead of waiting for Census 2027. Its companion Delimitation Bill, 2026 and Union Territories Laws (Amendment) Bill, 2026 did not proceed either.
How many enumerators are working on Census 2027?
About 31 lakh enumerators and supervisors have been mobilised, alongside more than 1 lakh census functionaries and roughly 18,600 technical staff engaged for about 550 days. More than 80,000 training batches are being run for each phase. The Union Cabinet approved an outlay of Rs 11,718.24 crore for the exercise.
Is my census information kept private?
Yes. Section 15 of the Census Act, 1948 makes individual records confidential — they are exempt from the Right to Information Act and inadmissible as evidence in court. For Census 2027 the government has added end-to-end encryption across collection, transmission and storage, hosting on data centres designated as Critical Information Infrastructure, and compliance with ISO/IEC 27001:2022 with periodic third-party security audits.
What is the difference between the Census and the SECC?
The Census is conducted under the Census Act, 1948, its individual records are confidential, and it produces aggregate demographic statistics. The Socio Economic and Caste Census of 2011 was an executive exercise outside that Act, designed to identify households for benefit targeting, and its caste data was never fully released because of classification problems. Caste data from Census 2027 will carry the Census Act's statutory backing, which the SECC never had.
Why was the 2021 Census not held?
Preparations were complete and Phase 1 field work was to begin in some States and UTs from 1 April 2020, but the exercise was postponed when the COVID-19 pandemic broke out. The postponement ran for several years, which is why India's most recent full census data still dates from 2011 and why Census 2027 breaks a decennial series that had run unbroken since 1881.
Prepare with us
Census, caste and delimitation are one connected question.
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