Overview The Census 2027 will be carried out in two phases. Phase I, known as the House Listing and Housing Census , has been notified. It gathers information on housing condition, household head’s name, sex (including male, female, transgender), amenities and assets. Phase II, the Population Enumeration , will follow later. Key Developments Phase I questionnaire released; Phase II details to be notified in due course. Enumerators will conduct house‑to‑house visits across the entire enumeration area to ensure no exclusion. A self‑enumeration portal is available, with built‑in FAQs, tool‑tips and validation checks. All field staff, including enumerators and supervisors, receive comprehensive training; the mobile application incorporates validation rules for data consistency. Robust data security protocols are in place for mobile collection, transmission and server storage. The initiative was outlined by Shri Nityanand Rai , Minister of State for Home Affairs, in a written reply to a Rajya Sabha question. Important Facts Three categories for the sex of the household head: Male, Female, Transgender . Enumerators will verify self‑enumerated data before final submission. Supervisors will monitor and cross‑check data collected by enumerators. Validation rules embedded in the mobile app help minimise entry errors. UPSC Relevance The census is a cornerstone for policy formulation, resource allocation and electoral delimitation, making it a frequent topic in GS2 and GS3 . Understanding the methodology, data security measures and inclusion of transgender categories reflects India’s commitment to social equity, a point of interest for ethics and governance questions. Way Forward Successful execution will depend on: Effective training and supervision of field staff. Public awareness to boost participation in self‑enumeration. Continuous monitoring of data quality through the mobile app’s validation checks. Ensuring that data security protocols keep pace with evolving cyber threats. Timely completion of Phase I will set the foundation for a comprehensive Phase II, enabling accurate demographic profiling for the next decade.