Census‑2027: Digital Launch and Self‑Enumeration The Ministry of Home Affairs has unveiled the schedule and methodology for Census of India 2027, the world’s largest population count. For the first time, the census will be entirely digital and will offer a Self‑Enumeration option. The operation will be executed in two phases, beginning on 1 April 2026 . Key Developments Phase I – House Listing and Housing Census (HLO) will run from 16 April to 15 May 2026 in eight pilot states/UTs, preceded by a 15‑day Self‑Enumeration period (1‑15 April 2026). Phase II – Population Enumeration (PE) scheduled for February 2027 (or September 2026 in snow‑bound areas), will capture data on age, sex, education, migration, fertility, caste, etc. All enumerators will use a Mobile App on smartphones to submit data instantly. Self‑Enumeration portal (se.census.gov.in) supports 16 languages, generates a unique SE ID, and integrates with field enumerators for verification. Budget allocation of ₹11,718.24 crore covers honorarium, training, IT infrastructure, and logistics. More than 3 million enumerators, supervisors and officials will be mobilised across 36 states/UTs, 7,092 sub‑districts, 5,128 statutory towns, 4,580 census towns and ~6,39,902 villages. Important Facts The census is conducted under the Census Act, 1948 and the amended Census Rules, 1990 . The reference date for Census‑2027 is 00:00 hrs, 1 March 2027 (or 1 October 2026 for Ladakh, snow‑bound Jammu & Kashmir, Uttarakhand and Himachal Pradesh). A full‑scale pre‑test was carried out in November 2025 across ~5,000 blocks. Training architecture includes 100 national trainers, 2,000 master trainers, 45,000 field trainers and about 31 lakh enumerators, with materials prepared in regional languages. UPSC Relevance Understanding the census framework is vital for GS‑1 (Indian polity and governance) and GS‑3 (demography, socio‑economic planning). The shift to digital data collection reflects India’s broader Digital India agenda, linking to topics on e‑governance, data security, and technology‑enabled public services. The inclusion of caste enumeration in Phase II has implications for social justice policies and affirmative action debates. Way Forward States must finalize their Phase‑I schedules and ensure enumerator readiness. Continuous monitoring via the real‑time dashboard will be essential to address any data‑quality issues promptly. Post‑census, the massive dataset will feed into the 15th Five‑Year Plan, influencing resource allocation, urban planning, and welfare schemes. Aspirants should track subsequent notifications on questionnaire details and the final rollout calendar.