Why in News: India’s Census 2027 – the first fully digital census and the world’s largest enumeration exercise – is currently in Phase I (House Listing and Housing Census / HLO Phase), running since April 2026 through September 2026 in rolling 30-day state windows. Several states including Andhra Pradesh, Madhya Pradesh, and Chandigarh are in their active HLO window in the May 14-30, 2026 period. For the first time, Indian citizens can self-enumerate digitally via the portal se.census.gov.in before the enumerator visits. Phase II (Population Enumeration) is scheduled for February 2027.
India’s Decadal Census – Constitutional and Legal Framework
Constitutional Basis
India’s census is conducted under:
- Census Act, 1948 – the primary legislative authority
- Union List, Entry 69 of the Seventh Schedule – “Census” is a Union subject
- Article 246 – Parliament has exclusive legislative power over Union List subjects
Nodal Authority
| Feature | Detail |
|---|---|
| Conducting authority | Office of the Registrar General and Census Commissioner of India (ORGI) |
| Ministry | Ministry of Home Affairs (MHA) |
| Census Commissioner | Mritunjay Kumar Narayan (current, 2026) |
| Frequency | Every 10 years (decadal) |
| Legal compulsion | Citizens are legally obligated to respond (Census Act, 1948, Section 11 – penalty for obstruction) |
Census 2027 – Background and Delay
India’s census follows a decadal cycle:
| Census Year | Notable Feature |
|---|---|
| 2001 | First computerised census; house-listing digital capture |
| 2011 | Last completed census; population: 121.09 crore |
| 2021 | Postponed – COVID-19 pandemic (originally planned March-April 2020) |
| 2027 | Census 2027 – rescheduled; 16-year gap since last census |
The 16-year gap is unprecedented in India’s post-Independence census history. The delay has affected:
- Delimitation exercise (constituency boundaries based on 2001 data still)
- OBC reservation (political demand to count OBCs in census – unresolved)
- Welfare scheme targeting (Aadhaar-linked beneficiary lists based on 2011 SECC data)
Census 2027 – Structure and Innovation
Two-Phase Structure
| Phase | Name | Period | What Is Counted |
|---|---|---|---|
| Phase I | House Listing and Housing Census (HLO) | Rolling state windows (since April 2026 through September 2026, 30 days per state) | Buildings, households, ownership, amenities, assets |
| Phase II | Population Enumeration | February 2027 | Population headcount, age, sex, literacy, occupation, religion, SC/ST status, language |
Digital-First Approach
Census 2027 introduces four technological innovations:
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Self-Enumeration Portal (se.census.gov.in): Citizens can fill their HLO data digitally in a self-enumeration window (approximately 3 weeks before the enumerator’s scheduled visit). If submitted online, the enumerator verifies rather than re-collects.
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Mobile App for Enumerators: Field enumerators use a dedicated Census App (Android-based) on government-issued smartphones, replacing paper schedules entirely.
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Geo-tagging of structures: Every building/household is geo-tagged using GPS coordinates, creating a National Building Register for the first time.
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Real-time monitoring dashboard: ORGI has a live dashboard tracking enumeration progress across districts, enabling course corrections.
Census – Key Data Points (2011 – Last Completed Census)
| Indicator | 2011 Census |
|---|---|
| Total population | 121.09 crore (1,210.9 million) |
| Decadal growth rate | 17.64% (2001-11) |
| Sex ratio (overall) | 943 females per 1,000 males |
| Child sex ratio (0-6 years) | 919 per 1,000 (alarm) |
| Literacy rate | 74.04% (males: 80.9%; females: 64.6%) |
| Urban population | 31.2% (urban population crossing 400 million) |
| Scheduled Castes | 16.6% of population |
| Scheduled Tribes | 8.6% of population |
The OBC Enumeration Debate
Background: The census has counted SC, ST, and religious populations since Independence, but Other Backward Classes (OBCs) have not been counted in the decadal census since 1931.
The political demand:
- Multiple political parties (SP, JDU, BJD, DMK) demand that OBCs be counted in Census 2027
- The Mandal Commission (1980) estimated OBCs at ~52% of population based on 1931 census data
- A fresh count would enable policy-based OBC reservation design and settle the debate on OBC population share
Government position:
- The NDA government agreed in principle to include OBC enumeration
- The Socio-Economic Caste Census (SECC) of 2011 collected caste data but was never released in full
- As of 2026, the government has not announced whether caste (OBC) enumeration will be part of Census 2027
NPR – National Population Register (Connection to Census)
The National Population Register (NPR) was to be updated alongside the census:
- NPR is a register of every usual resident of India (not restricted to citizens)
- Updated during the HLO Phase of the census
- Governed by Citizenship Rules, 2003 (under Citizenship Act, 1955)
- NPR was controversial in 2019-2020 due to its perceived link with the NRC (National Register of Citizens); the government has since delinked the two processes
UPSC Relevance
GS Paper 1 – Indian Society and Geography
- India’s demographic profile; literacy; sex ratio; urbanisation trends (2011 data)
- OBC enumeration debate; caste and demographic data
GS Paper 2 – Polity and Governance
- Constitutional basis of census; Union List Entry 69; Census Act 1948
- Digital governance; self-enumeration and citizen participation
- NPR, NRC distinction; census and citizenship
Keywords: Census 2027, ORGI, Census Act 1948, Union List Entry 69, self-enumeration portal, HLO Phase, Population Enumeration, OBC enumeration, NPR, National Building Register, decadal census, 2011 census data.
Facts Corner – Knowledgepedia
ORGI: Office of the Registrar General and Census Commissioner of India; under MHA; conducts Census and maintains NPR; also conducts Sample Registration System (SRS) for vital statistics between censuses.
Census Act, 1948: Section 3: Central Government may direct census; Section 8: duty to answer questions; Section 11: penalty for obstruction; the Act empowers the census commissioner to require information.
Union List Entry 69: “Census” – Parliament has exclusive power; no State can conduct a rival census (some states like Bihar and Telangana conducted their own caste surveys – legally these are socio-economic surveys, not censuses).
Sample Registration System (SRS): Annual data on births, deaths, Total Fertility Rate (TFR) between censuses; latest data shows India’s TFR at 2.0 (below replacement level of 2.1) – confirmed by NFHS-5 (2019-21).
Delimitation: Redrawing of constituency boundaries based on latest census population data; the 84th Constitutional Amendment (2002) froze delimitation until the first census after 2026 – meaning Census 2027 data will trigger the next delimitation exercise, significantly reshuffling political representation.
