Key HighlightsThe Union Government, through the Ministry of Home Affairs, notified 40 questions on 14 August 2026 for the population enumeration phase of Census 2027. This expands the scope of data collection to include caste, COVID-19 vaccination details, bank accounts, and identification numbers such as Aadhaar.Historical Significance of Caste EnumerationFirst Since Independence: For the first time since Independence, citizens will be asked to record their caste. Previously, comprehensive enumeration was limited only to Scheduled Castes (SC) and Scheduled Tribes (ST).Question 10: The specific query appears as question number 10 in the Household Schedule under the heading "Scheduled Caste (SC)/ Scheduled Tribe (ST)/Caste".Approval: The Cabinet Committee on Political Affairs approved the inclusion of caste enumeration on 30 April 2025.Notable Additions to the QuestionnaireApart from standard demographic, educational, economic, and migration data, several new parameters have been introduced:Identity Details: Aadhaar number, Voter ID number, passport number (for Indian passport holders), and the availability of a driving licence, wherever applicable.Health and Finance: Place of COVID-19 vaccination and the total number of bank accounts.Digital Literacy: Literacy status queries now include digital literacy status.Digital Census and MethodologyFirst Digital Census: Census 2027 will be India's first digital census, utilising digital tools for data collection.Self-Enumeration: Residents will have an optional 15-day window for self-enumeration immediately before the house-to-house exercise begins.Timeline: The population enumeration (second phase) is scheduled to begin in February 2027 across most of the country. However, in Ladakh and snow-bound areas of Jammu and Kashmir, Uttarakhand, and Himachal Pradesh, the exercise will commence earlier.Constitutional and Legal FrameworkLegislation: The census is governed by the Census Act, 1948, and the Census Rules, 1990.Confidentiality: Section 15 of the Census Act ensures that personal information collected remains confidential. It prohibits the disclosure of personal census information and restricts its use as evidence in court or disclosure to institutions.Union Subject: The Census is a Union subject under the Constitution of India.Financial OutlayThe Union Cabinet has approved a financial outlay of Rs 11,718.24 crore for conducting the census exercise.