Overview The Government of India will launch Census 2027 as a completely digital exercise. From 1 April 2026 , a self‑enumeration portal will be operational, enabling citizens to submit their details at their convenience. Key Developments All enumerators will use mobile applications for data capture, eliminating paper‑based forms. The self‑enumeration portal supports English and 15 Indian languages. Participation is mandatory under the Census Act, 1948 ; non‑compliance may attract penalties. Section 8 of the Act obliges respondents to answer all questions truthfully; Section 15 guarantees confidentiality of individual data. After submission, a unique SE ID is displayed and must be shown to the enumerator during the house‑listing phase. Important Facts Phases of data collection : Phase I – House‑listing & Housing Census : captures dwelling characteristics, amenities (water, electricity, internet), and asset ownership (TV, computer, two‑/four‑wheelers). Phase II – Population Enumeration : records individual details – name, age, sex, marital status, caste, religion, education, language, disability, migration, occupation, and fertility data for married women. No documentary proof is required; respondents must provide accurate information to the best of their knowledge. Preliminary results will be released a few months after enumeration, with detailed tables published in phases on the official website censusindia.gov.in . UPSC Relevance The census is a cornerstone for policy formulation, resource allocation, and electoral delimitation. Understanding its legal framework ( Section 8 , Section 15 ) helps answer questions on governance and data privacy. The shift to a fully digital process illustrates India’s e‑governance drive, relevant for GS2 (Polity) and GS3 (Economy) topics on technology adoption in public administration. Way Forward for Aspirants Familiarise yourself with the two‑phase structure; many UPSC questions link housing data with poverty estimates. Note the legal provisions (Census Act, Sections 8 & 15) as they often appear in ethics and polity papers concerning citizen duties and data confidentiality. Understand the role of the Registrar General in overseeing the digital rollout; this reflects central‑state coordination mechanisms. Keep track of the timeline: self‑enumeration opens on 1 April 2026 , field enumeration follows, and preliminary data are expected by late 2027. By mastering these details, candidates can confidently tackle questions on demographic data, legal mandates, and digital governance in the UPSC examination.