Key Data Sources on Indian Households: Census, NFHS, and NSSO

Behind every government scheme that pipes water into homes, builds toilets, or extends electricity to remote villages lies one quiet, foundational ingredient: data on Indian households. Policymakers, researchers, and planners don’t guess at how families live, what they own, or what they lack. They turn to a small set of large, scientifically designed datasets. Three of these stand out as the backbone of household-level evidence in the country, the Census of India, the National Family Health Survey (NFHS), and the surveys conducted by the National Sample Survey Organisation (NSSO). Together, they tell us who lives where, in what kind of house, with what amenities, and at what standard of living.

Why household data matters 🔗

A household is the smallest unit where most socio-economic decisions are taken, what to eat, where children study, how water is fetched, what fuel is used for cooking. When millions of these decisions are aggregated through a survey, patterns emerge: which districts still lack tap water, which states have the highest share of pucca houses, which communities are stuck with non-durable shelter. Indian housing has transformed dramatically over the last three decades, with the share of households living in non-durable homes made of mud, earth or thatch falling from about half in 1993 to roughly 5 percent by 2021. Such long-term comparisons are only possible because India has invested, since the 1950s, in systematic household enumeration.

The three big sources differ in important ways. The Census tries to count every household, every ten years. The NFHS samples lakhs of households to dig deep into health, fertility, nutrition, and household conditions. The NSSO surveys focus on consumption, expenditure, employment, and welfare. Used together, they give a 360-degree view.

Census of India: the decadal headcount 🔗

The Census is the oldest and most comprehensive source. Conducted every ten years by the Office of the Registrar General and Census Commissioner under the Ministry of Home Affairs, it aims to cover the entire country without omission or duplication. The 2011 Census, the most recent completed exercise, was carried out in two phases. The first phase, called Houselisting and Housing Census, was undertaken a few months before the second phase of Population Enumeration. It is this first phase that produces most of the rich data on households and the homes they live in.

What the Census collects about households 🔗

The Census uses a House list and Housing Schedule that captures the physical and material condition of every census house. As per the 2011 Census, India had 330.84 million houses, of which 306.16 million were occupied and 24.67 million were vacant, with 220.70 million houses in rural areas and 110.14 million in urban areas. For each of these, enumerators record building materials of floor, wall and roof, condition of the house as good, livable or dilapidated, number of dwelling rooms, ownership status, and tenure.

The schedule then probes amenities and assets in detail. It captures the main source of drinking water and its location, source of lighting, type of latrine and bathing facility, drainage connectivity, kitchen availability, and fuel used for cooking. It also records assets owned by the household, radio, television, computers with and without internet, mobile and landline phones, bicycle, scooter or motorcycle, car, and whether the household avails banking services. The upcoming Census 2027 houselisting will collect data on 33 items covering housing conditions, household characteristics, amenities and asset ownership, with additions like LPG/PNG connections, internet access, and the household’s primary cereal of consumption.

Strengths and limits 🔗

The Census is unmatched for one reason, scale. Because it counts every household, it can produce reliable data right down to the village, town, and ward level, and disaggregate by social groups such as Scheduled Castes and Scheduled Tribes. This is why the Census remains the main source of information on housing condition, basic amenities and household assets in India. The flip side is timing. With a ten-year gap and the 2021 Census postponed, the country has been working with increasingly dated baseline figures, a gap the upcoming 2027 round is meant to close.

National Family Health Survey: the deep-dive on people and homes 🔗

If the Census provides breadth, the National Family Health Survey provides depth. The NFHS is a large-scale, multi-round, household-based survey conducted by the International Institute for Population Sciences (IIPS), Mumbai, as the nodal agency for the Ministry of Health and Family Welfare, Government of India, with periodic rounds since 1992. Five rounds have been completed so far, with NFHS-5 covering 2019-21.

Design and reach 🔗

The NFHS uses a stratified, multi-stage sample. Villages serve as the Primary Sampling Units in rural areas and Census Enumeration Blocks in urban areas, with around 22 households randomly selected in each unit. NFHS-5 produced estimates at the national, state, and district level for all 707 districts, and in total, the surveys covered 636,699 households, 724,115 women aged 15-49 years, and 101,839 men aged 15-54 years. This makes it one of the largest demographic and health surveys in the world.

What it captures about households 🔗

NFHS questionnaires are layered. A Household Questionnaire gathers basic information on every usual member and visitor, plus the socioeconomic profile of the dwelling. According to the survey design, the household questionnaire collects information on socioeconomic characteristics, water and sanitation, health insurance, and number of deaths in the household in the three years preceding the survey. Specifically, it records materials used for the floor, roof and walls; type of toilet facility; source of drinking water and treatment practices; type of cooking fuel; ownership of various durable goods; land ownership; and health insurance coverage.

Layered on top are the Woman’s and Man’s questionnaires, which capture fertility, contraception, reproductive health, child immunisation, nutrition, domestic violence, anaemia, hypertension, diabetes, and lifestyle. NFHS-5 added new areas including disabilities, preschool education, access to toilet facilities, death registration, and methods and reasons for abortion.

Why NFHS is invaluable 🔗

The NFHS connects housing conditions to human outcomes. It allows researchers to ask: does open defecation correlate with childhood stunting? Does cooking fuel choice affect women’s respiratory health? Does ownership of a refrigerator correlate with better child nutrition? Because the same household provides both housing and health data, these linkages can be studied directly. The trade-off is that the NFHS, being a sample survey, cannot give reliable estimates for very small geographies like a single village.

National Sample Survey Organisation: the consumption and welfare lens 🔗

The third pillar is the NSSO, now operating under the National Statistical Office within the Ministry of Statistics and Programme Implementation. The National Sample Surveys have been conducted by the Government of India since 1950 to collect socio-economic data employing scientific sampling methods. Where the Census tells us what families have and the NFHS tells us how they are doing health-wise, the NSSO tells us what they earn, spend, and lack.

The Household Consumption Expenditure Survey 🔗

The flagship NSSO product on households is the Household Consumption Expenditure Survey (HCES). The latest available round, conducted from August 2022 to July 2023, drew on a central sample of 2,61,746 households, 1,55,014 in rural areas and 1,06,732 in urban areas. The HCES generates estimates of household Monthly Per Capita Consumption Expenditure (MPCE), separately for rural and urban sectors, for States, Union Territories, and socio-economic groups.

The schedule is detailed. Households are asked about food spending over the last 30 days, fuel and light, clothing and footwear over the last 365 days, education and medical expenses, miscellaneous goods and services, and expenditure on durable goods. The HCES data is also used to prepare the weighting diagram for compilation of official Consumer Price Indices, which feed directly into inflation measurement and monetary policy.

Other NSSO surveys on households 🔗

Beyond consumption, the NSSO has conducted dedicated rounds on housing condition, drinking water, sanitation and hygiene, employment and unemployment, debt and investment, and morbidity and healthcare. These are now complemented by the Periodic Labour Force Survey (PLFS), which has taken over annual employment estimates. For housing scholars, the NSSO’s housing-condition rounds are particularly useful because they capture rent, tenure, and dwelling characteristics more frequently than the Census.

Types of household data the three sources put on the table 🔗

Putting the three together, the kinds of household indicators available for India fall into a few broad buckets.

Housing condition and structure 🔗

Materials of floor, wall, and roof; number of rooms; condition of dwelling; tenure status; persons per room and crowding indices. The Census provides the most granular geographic detail, while the NFHS and NSSO provide periodic updates between Census rounds.

Basic amenities 🔗

Source and location of drinking water, type of latrine, drainage, bathing facility, kitchen, lighting source, cooking fuel. These are captured by all three sources with some methodological differences. For example, the Central Public Health and Environmental Engineering Organisation has analysed Census 2011 data to track changes in drinking water sources and latrine facilities across urban India between 2001 and 2011, illustrating how Census data feeds straight into infrastructure planning.

Household assets and digital access 🔗

Ownership of television, refrigerator, mobile phone, computer, internet access, vehicles, and banking services. These indicators have become proxies for living standards, especially in the absence of reliable income data at household level in India.

Consumption, expenditure, and welfare 🔗

Monthly per capita expenditure, food and non-food breakdowns, share of imputed value from free welfare entitlements like the National Food Security Act and Pradhan Mantri Garib Kalyan Ann Yojana. This is primarily NSSO territory.

Health, nutrition, and demographics 🔗

Fertility, child and maternal health, immunisation, anaemia, hypertension, diabetes, domestic violence, women’s empowerment. This is the NFHS’s signature contribution.

How this data shapes policy 🔗

These data sources don’t sit in archives. They feed directly into the design, targeting, and evaluation of welfare schemes.

Census data on toilet availability informed the scale and targeting of the Swachh Bharat Mission. Tap water access figures from the Census, showing that only about 30.8 percent of rural households and 70.6 percent of urban households had tap water in 2011, became the baseline for the Jal Jeevan Mission’s push for household tap connections. NFHS indicators on child stunting and anaemia have driven Poshan Abhiyaan and revisions in the Integrated Child Development Services. The NSSO’s MPCE data is used to estimate poverty lines, design food subsidies, and calibrate the Public Distribution System.

Beyond welfare design, these datasets enable monitoring. SDG India indices, state-level rankings, and district-level planning all draw on this triad. For private investors, market researchers, and academics, the same data illuminates demand for housing, consumer goods, and services.

Reading the three sources together 🔗

No single dataset is perfect. The Census has unmatched coverage but is dated and infrequent. The NFHS goes deeper but cannot drill below the district. The NSSO surveys vary in periodicity and have at times been the subject of methodological debate. The smart approach is triangulation, using each source for what it does best, and reading them together to cross-check trends. For instance, comparing NFHS-5 numbers on improved drinking water and sanitation against Census 2011 and the upcoming Census 2027 will tell us how much real progress has happened on the ground, rather than relying on administrative claims alone.

For any student of population and development in India, basic familiarity with these three sources is non-negotiable. They are the lenses through which the country sees itself, counts itself, and decides what to fix next.

What do you think? If you were designing a new housing or sanitation scheme for your district, which of these three data sources would you lean on first, and what gaps would you still face? And do you think a more frequent, lighter-touch household survey, perhaps every two or three years, would serve India better than the current decadal Census model?

References

1. https://www.dataforindia.com/housing/
2. https://catalog.ihsn.org/index.php/catalog/4161
3. https://mohua.gov.in/upload/uploadfiles/files/Housing_in_India_Compendium_English_Version2.pdf
4. https://www.easternmirrornagaland.com/housing-amenities-and-assets-to-be-counted-in-census-2027-houselisting-phase
5. https://iipsindia.ac.in/sites/default/files/Report_Asset_Amenities_Bhagat2.pdf
6. https://nfhsindia.org/
7. https://ruralindiaonline.org/en/library/resource/national-family-health-survey-nfhs-5-2019-21-india/
8. https://www.nfhsiips.in/nfhsuser/nfhs5.php
9. https://datacatalog.ihsn.org/catalog/12933
10. https://www.pib.gov.in/PressReleaseIframePage.aspx?PRID=2008737
11. https://catalog.ihsn.org/catalog/12934
12. https://www.indiawaterportal.org/articles/analysis-2011-census-data-household-amenities-respect-drinking-water-sources-and-latrine-0