Census of India

The census is the official count of every person living in India, done once every ten years. It also collects details about each person and each house: age, sex, religion, language, education, work, migration, housing and amenities. It is the single largest source of information about India's people, and almost every government plan depends on it.

Why do we need a census?

A government cannot plan for people it has not counted. Census numbers decide how many seats each state gets in Parliament, which villages count as towns, how many Scheduled Caste and Scheduled Tribe seats are reserved, and how money and schemes are shared. Think of it as the country's family register: without it, every budget is a guess.

Where does the power come from?

• The Constitution: "Census" is a Union subject, listed as Entry 69 of the Union List in the Seventh Schedule. So only Parliament can make laws on it, and the central government conducts it.
• The Census Act, 1948: This is the main law. It allows the central government to announce a census, appoint census officers, and require people to answer questions. The Census Rules, 1990 fill in the details.
• Section 15 of the Census Act makes census records confidential. No one can inspect an individual's census record, and it cannot be used as evidence in a court case (except for offences under the Census Act itself). This is why people can answer honestly.
• The Act also punishes refusing to answer or giving false answers, and punishes census officers who misuse data.

Who runs it?

The Office of the Registrar General and Census Commissioner, India (ORGI), under the Ministry of Home Affairs, runs the census. It was set up in 1949. The same officer is also the Registrar General under the Registration of Births and Deaths Act, 1969, so ORGI also runs the Civil Registration System and the Sample Registration System (which estimates birth and death rates every year).

In each state, a Director of Census Operations leads the work, and lakhs of enumerators (mostly government teachers and staff) collect the data.

History of India's census

• 1872: The first census in British India, but not done at the same time everywhere (non-synchronous).
• 1881: The first complete, synchronous census, taken at the same time across British India, under W.C. Plowden, the Census Commissioner. Since then, a census has been held every ten years without a break until 2011.
• 1931: The last census that published full caste-wise data for all castes. The 1941 census collected caste data but did not publish it fully because of the Second World War.
• 1951: The first census of independent India. From then on, only Scheduled Castes and Scheduled Tribes were counted by caste, not other castes.
• 2011: The 15th census overall and the 7th after Independence. India's population was 121.09 crore, sex ratio 943 females per 1,000 males, and literacy 74.04%. A separate Socio-Economic and Caste Census (SECC) was also done in 2011, outside the Census Act, but its caste data was never released.
• 2021: The census due in 2021 was postponed, first because of the COVID-19 pandemic.
• Census 2027: The 16th census overall and the 8th after Independence.

How does a census work?

It happens in two phases:

1. Houselisting and Housing Census: Enumerators list every building and household and record housing conditions and amenities (drinking water, toilet, electricity, cooking fuel, assets). For Census 2027 this ran from 1 April to 30 September 2026, with each state getting a 30-day window and an optional 15-day online self-enumeration window before it.
2. Population Enumeration: Enumerators visit every household and record details of every person. All data is counted as on a fixed reference date. For most of India this is 00:00 hours on 1 March 2027. For snow-bound areas (Ladakh and snow-bound parts of Jammu and Kashmir, Himachal Pradesh and Uttarakhand) it was 1 October 2026, because these areas are hard to reach in winter. A few states have been given earlier schedules by later notifications.

What is new in Census 2027?

• Digital census: Enumerators use mobile apps instead of paper, and households can fill in their own details online (self-enumeration) and get an ID to show the enumerator.
• Caste enumeration: On 30 April 2025, the Cabinet Committee on Political Affairs decided that caste would be counted in the census, for the first time since 1931. Caste will be recorded in the Population Enumeration phase.
• Cost: The Union Cabinet approved about ₹11,718 crore for Census 2027.

What is the census used for?

• Delimitation: Lok Sabha and Assembly seats are readjusted after a census (Articles 82 and 170).
• Reservation: SC and ST seats in legislatures and local bodies are fixed by their population share (Articles 330, 332, 243D, 243T).
• Finance: Finance Commissions use population data to share central taxes with states.
• Schemes: Ration under the National Food Security Act, 2013 is based on population figures. Old numbers mean some eligible people are left out.

Commonly confused concepts

• Census vs National Population Register (NPR): The census is under the Census Act, 1948 and its individual data is confidential. The NPR is a register of usual residents prepared under the Citizenship Act, 1955 and the Citizenship Rules, 2003, and it is meant to be used for identification.
• Census vs SECC 2011: The census is a statutory exercise under the Census Act. SECC 2011 was done by the Ministries of Rural Development and Housing and Urban Poverty Alleviation, outside the Census Act.
• Census vs Sample Registration System (SRS): The census counts everyone every ten years. The SRS is a yearly sample survey that estimates birth rate, death rate and infant mortality.
• Census vs Civil Registration System (CRS): The CRS records births and deaths as they happen, under the Registration of Births and Deaths Act, 1969.

Issues, criticism and the way forward

• Long delay: India had no census for over 15 years after 2011. Policies, food security coverage and urban planning were based on old data.
• Caste counting challenges: There are thousands of caste names, many spellings and sub-groups. Experts suggest a clear, pre-tested list and careful coding so that the data is reliable.
• Digital divide: Online self-enumeration may be easier for urban, literate households. Door-to-door visits remain essential so that no one is missed.
• Privacy: Digital data needs strong protection. Section 15 confidentiality must be matched by secure technology.
• Way forward: Timely release of data, clear communication to build public trust, and well-trained enumerators are key. Some experts also suggest fixing the census by law so it cannot be delayed easily.

Concepts to Know

• Enumeration: The act of counting people and recording their details, one by one.
• Enumerator: The person, usually a government employee, who visits homes and collects census information.
• Reference date: The fixed moment for which all census data is counted. A baby born after it is not counted; a person who dies after it is counted.
• Synchronous census: A census taken at the same time across the whole country.
• Union List: The list in the Seventh Schedule of subjects on which only Parliament can make laws.
• Sex ratio: Number of females per 1,000 males.