Odisha and Uttar Pradesh are among the first to roll out the digital exercise.
2027's housing census trims questions but adds digital-age indicators like Internet and smartphones.
A special dedicated web portal will be launched for self-enumeration during the upcoming Census, which will be available for both phases of the national enumeration exercise, officials said Monday.
Census exercise with caste enumeration will be carried out with the reference date of October 1, 2026, in snow-bound areas like Ladakh and of March 1, 2027, in the rest of the country, the Home Ministry announced on Wednesday.