Population: Distribution, Density, Growth and Composition

Why this chapter matters for UPSC: India's population geography underlies a large share of GS1: why people are concentrated in the plains and sparse in the hills, how growth passed through four phases, why the sex ratio is worst in prosperous States, what the work participation rate says about the economy, and how the demographic dividend depends on the age structure. Mains has asked about tribal and SC sex ratios, adverse sex ratios in rich regions, population and poverty, women's empowerment and fertility, population education and the demographic dividend. In the 2026-27 NCERT reprint this is still Chapter 1, with the same text, a corrected work-participation range and some updated examples.

Contemporary hook: Census 2011 counted 121.09 crore people, and it remains India's latest census: the 2021 count was never held, and Census 2027 is under way. Between censuses the estimates come from elsewhere. The UN's World Population Prospects 2024 puts India at 1,463.9 million in 2025, ahead of China since 2022, and projects a peak of about 1,701 million in 2061. India's own Sample Registration System put the total fertility rate at 1.9 in 2024, below the replacement level of 2.1, and the sixth National Family Health Survey (2023-24, released in May 2026) found 2.0.

🧠 First Principles — Read This First

Where people live is set by physical conditions first and history second. NCERT names climate, terrain and the availability of water as the physical factors that "largely" decide where Indians live: the northern plains, the deltas and the coastal plains carry far more people than the interior of the southern and central States, the Himalaya, parts of the north-east and the west. But human effort can shift the pattern: irrigation in Rajasthan, minerals and energy in Jharkhand and transport in the peninsula have raised densities in areas once thinly settled. Behind these lie socio-economic and historical factors, above all the early evolution of settled agriculture in the river plains, and later industry and urbanisation, which pull migrants to Delhi, Mumbai, Kolkata, Bengaluru, Pune, Ahmedabad, Chennai and Jaipur.

Growth follows the gap between births and deaths. Population growth has a natural component (births minus deaths) and an induced one (migration); the chapter studies the natural one. India's growth since 1901 falls into four phases, each explained by how the death rate and the birth rate moved: both high and growth stagnant (1901-21); deaths falling, growth steady (1921-51); deaths falling fast while births stayed high, the "population explosion" (1951-81); births falling, growth slowing (after 1981). The rest of the chapter, composition by place, language, religion and work, describes who these people are.

PART 1 — Quick Reference

India's Population, Census 2011

Source: NCERT Class XII, India: People and Economy (2021-22), ch. 1 and Appendix (i); Census of India 2011, Primary Census Abstract (final). The final count includes estimates for three sub-divisions of Manipur's Senapati district.

Distribution and Density (NCERT)

NCERT's densities are from the provisional Census 2011 count (Appendix i).

The Four Phases of Growth (NCERT Table 1.1)

Sex Ratio Extremes, Census 2011 (final)

Among States alone the lowest is Haryana (879). Child sex ratio: Haryana 834, Punjab 846, Jammu and Kashmir 862. Source: Census of India 2011, Primary Census Abstract (final); Daman and Diu and Dadra and Nagar Haveli are one UT since 26 January 2020.

PART 2 — Concepts & Narrative

Sources of Population Data

Population data in India come from the Census, held every ten years. The first census was conducted in 1872, but the first complete census only in 1881. NCERT opens with a comparison: India's population is larger than that of North America, South America and Australia put together.

Distribution of Population

India's population is highly uneven in its spread. Uttar Pradesh has the largest share, followed by Maharashtra, Bihar and West Bengal; with Andhra Pradesh, Tamil Nadu, Madhya Pradesh, Rajasthan, Karnataka and Gujarat, these ten States held about 76% of India's people in 2011. Jammu and Kashmir, Arunachal Pradesh and Uttarakhand hold small shares despite large areas.

NCERT explains the pattern through two sets of factors. Physical: climate, terrain and water decide the broad pattern, so the North Indian Plains, the deltas and the coastal plains are crowded and the dry, cold or rugged interior is not. Human intervention can override this: irrigation in Rajasthan, mineral and energy resources in Jharkhand and the transport network in the peninsular States have brought moderate to high concentrations to once thinly peopled areas. Socio-economic and historical: the evolution of settled agriculture, the pattern of settlement, transport, industrialisation and urbanisation. The river plains and coasts stay crowded even where their land and water show signs of degradation, because of their early history of settlement and transport; the large cities draw rural-urban migrants because of industry and urban growth.

Density of Population

Density is the number of persons per unit area. India's density in 2011 was 382 per sq km, up from 117 in 1951, an increase of more than 200 persons per sq km in fifty years. The range is wide: from 17 in Arunachal Pradesh to 11,297 in Delhi. In the north, Bihar (1,102), West Bengal (1,029) and Uttar Pradesh (828) are dense; in the peninsula, Kerala (859) and Tamil Nadu (555). The Himalayan hill States and the north-eastern States other than Assam have low densities; the Union Territories, except the Andaman and Nicobar Islands, very high ones.

Growth of Population and Its Four Phases

Growth is the change in the number of people in an area between two points of time, expressed as a percentage. Its natural component is assessed from crude birth and death rates; its induced component from in- and out-migration. India's annual growth rate in 2011 was 1.64%. NCERT also defines the doubling time, the time a population takes to double at its current annual growth rate.

• Phase I, 1901-1921: stagnant or stationary. Growth was very low and even negative in 1911-21 (-0.31%). Both birth and death rates were high, because of poor health and medical services, illiteracy and an inefficient distribution of food and other necessities.
• Phase II, 1921-1951: steady growth. Better health and sanitation brought mortality down, and better transport and communication improved distribution, while the birth rate stayed high; growth rose despite the Great Depression of the 1920s and the Second World War.
• Phase III, 1951-1981: population explosion. Mortality fell rapidly while fertility stayed high, so the average annual growth rate reached 2.2%. Planned development improved living conditions, and international migration (Tibetans, Bangladeshis, Nepalis and people from Pakistan) added to growth.
• Phase IV, after 1981: slowing growth. Growth remained high but began to slow (Table 1.1: 24.66% in 1971-81, 23.85% in 1981-91, 21.54% in 1991-2001, 17.64% in 2001-11), because the crude birth rate fell, helped by a rising mean age at marriage and better quality of life, particularly female education.

NCERT quotes a World Development Report projection that India would reach 1,350 million by 2025. The UN's World Population Prospects 2024 estimates 1,463.9 million for mid-2025. (NCERT also calls India's growth rates "steadily increasing over time" in one sentence; its own Phase IV and Table 1.1 show the rate falling since 1971-81.)

Regional Variation in Growth

In 1991-2001, Kerala, Karnataka, Tamil Nadu, Andhra Pradesh, Odisha, Puducherry and Goa grew by no more than 20% over the decade, Kerala least of all (9.4%, the lowest in India). A continuous belt from west to east across the north-west, north and north-centre (Gujarat, Maharashtra, Rajasthan, Punjab, Haryana, Uttar Pradesh, Uttarakhand, Madhya Pradesh, Sikkim, Assam, West Bengal, Bihar, Chhattisgarh and Jharkhand) grew by 20-25% on average. In 2001-11 almost every State grew more slowly than in the previous decade. Among the six most populous States, the fall was smallest for Andhra Pradesh (3.5 percentage points) and largest for Maharashtra (6.7); Tamil Nadu (3.9 points) and Puducherry (7.1 points) grew faster than before.

The same north-south divide shows in fertility today. The SRS 2024 report gives total fertility rates of 2.9 in Bihar and 2.6 in Uttar Pradesh, against 1.3 in Kerala, Tamil Nadu and West Bengal and 1.2 in Delhi.

Adolescents and Youth

Adolescents (aged 10-19) were about 20.9% of India's population in 2011, 52.7% of them male and 47.3% female. NCERT sees them as a youthful population with high potential but vulnerable if not guided: it lists low age at marriage, illiteracy (especially female), school drop-outs, poor nutrition, high maternal mortality among adolescent mothers, HIV infection, disability, drug abuse, alcoholism, delinquency and crime. Government responses it names are the National Youth Policy, 2014 (February 2014), which defines youth as those aged 15-29 and aims "to empower the youth of the country to achieve their full potential", and the National Policy for Skill Development and Entrepreneurship, 2015, an umbrella framework linking skilling to demand.

Rural-Urban Composition

About 68.8% of Indians lived in villages in 2011. India had 6,40,867 villages, of which 5,97,608 (93.2%) were inhabited. The rural share varies: very high in States such as Bihar and Himachal Pradesh (only 11.3% and 10.0% urban in the final count); among the Union Territories, Dadra and Nagar Haveli was the most rural (53.38% rural in NCERT's figures). Village size ranges from fewer than 200 persons in the north-eastern hill States, western Rajasthan and the Rann of Kachchh to about 17,000 in Kerala and parts of Maharashtra. NCERT's 2026-27 text says Goa and Mizoram have "only little over half" their people in villages; the final Census shows both are majority-urban (Goa 62.2% urban, Mizoram 52.1%), so less than half live in villages.

The urban share, 31.16%, is low but growing faster than the rural, because of economic development and better health and hygiene. Rural-urban migration is conspicuous along the main road and rail links of the North Indian Plains and in the industrial areas around Kolkata, Mumbai, Bengaluru-Mysuru, Madurai-Coimbatore, Ahmedabad-Surat, Delhi-Kanpur and Ludhiana-Jalandhar. Urbanisation stays low in the agriculturally stagnant middle and lower Ganga plains, Telangana, non-irrigated western Rajasthan, the remote hilly and tribal north-east, the flood-prone areas of the peninsula and eastern Madhya Pradesh.

Linguistic Composition

India is a land of linguistic diversity. Grierson's Linguistic Survey of India (1903-1928) recorded 179 languages and 544 dialects. Today there are 22 scheduled languages and many non-scheduled ones; Hindi speakers form the largest share, and Sanskrit, Bodo and Manipuri the smallest scheduled groups (2011). Linguistic regions have no sharp boundaries; they merge and overlap in frontier zones.

Source: NCERT (2021-22), Table 1.2, from A. Ahmad, Social Geography (Rawat, 1999); Census of India 2011, Language Atlas, "Family-wise grouping of the 121 scheduled and non-scheduled languages". Census 2011 grouped 121 languages (22 scheduled, 99 non-scheduled).

NCERT's table places the sub-families: Austro-Asiatic (Mon-Khmer in Meghalaya and the Nicobar Islands; Munda in West Bengal, Bihar, Odisha, Assam, Madhya Pradesh and Maharashtra); South Dravidian (Tamil Nadu, Karnataka, Kerala), Central Dravidian (Andhra Pradesh, Madhya Pradesh, Odisha, Maharashtra) and North Dravidian (Bihar, Odisha, West Bengal, Madhya Pradesh); Tibeto-Burman branches across the Himalaya and the north-east; and Indo-Aryan (with the Dardic branch in Jammu and Kashmir) across the north, west and east.

Religious Composition

Source: NCERT (2021-22), Table 1.3, from Census of India 2011.

Hindus are the major group in most States (70-90% and above), except districts along the Bangladesh and Pakistan borders, Jammu and Kashmir, the north-eastern hill States and scattered areas of the Deccan and the Ganga plain. Muslims, the largest minority, are concentrated in Jammu and Kashmir, parts of West Bengal and Kerala, many districts of Uttar Pradesh, in and around Delhi and in Lakshadweep, and form a majority in the Kashmir valley and Lakshadweep. Christians live mostly in rural areas, along the western coast around Goa and Kerala, and in Meghalaya, Mizoram, Nagaland, the Chotanagpur area and the hills of Manipur. Sikhs are concentrated in Punjab, Haryana and Delhi. Jains live mainly in the urban areas of Rajasthan, Gujarat and Maharashtra; Buddhists mostly in Maharashtra, with other concentrations in Sikkim, Arunachal Pradesh, Ladakh, Tripura and Lahaul and Spiti. Religion also marks the landscape through sacred structures, cemeteries and sacred groves, from village shrines to large temples, mosques and cathedrals.

Composition of the Working Population

The Census divides people into main workers (working at least 183 days, or six months, in a year), marginal workers (less than 183 days) and non-workers. Only 39.8% of Indians were workers in 2011, leaving about 60% as non-workers: a large dependent population and, NCERT suggests, many unemployed or underemployed people. The work participation rate tends to be higher where economic development is lower, because subsistence activities need many manual workers. NCERT's 2026-27 text gives the range from 29.1% in Lakshadweep to 51.9% in Himachal Pradesh (correcting the 2021-22 text's "39.6% in Goa to 49.9% in Daman and Diu"). States with high participation include Himachal Pradesh, Sikkim, Chhattisgarh, Andhra Pradesh, Karnataka, Arunachal Pradesh, Nagaland, Manipur and Meghalaya.

The Census groups workers into cultivators, agricultural labourers, household industry workers and other workers. In 2011, 54.6% were cultivators and agricultural labourers (the primary sector), 3.8% were in household industries and 41.6% were other workers in non-household industry, trade, commerce, construction, repair and services. The agricultural share fell from 58.2% in 2001 to 54.6% in 2011, a shift from farm to non-farm work. Men outnumber women in every sector, but women's work is concentrated in the primary sector. The shares vary: Himachal Pradesh and Nagaland have large shares of cultivators; Bihar, Andhra Pradesh, Chhattisgarh, Odisha, Jharkhand, West Bengal and Madhya Pradesh of agricultural labourers; Delhi, Chandigarh and Puducherry of workers in services. The Periodic Labour Force Survey, on a different basis, put agriculture's share of workers at 43.0% in 2025.

PART 3 — UPSC Integration

Frames that score. For distribution and density, use NCERT's two sets of factors with an example each (irrigation in Rajasthan, minerals in Jharkhand, transport in the peninsula; early settlement in the river plains). For growth, give the four phases with the birth and death rate behind each, then the current position from SRS 2024 (fertility below replacement). For the sex ratio, use the final Census figures and the point NCERT makes in chapter 3: the worst child sex ratios are in prosperous States.

Exam Strategy

For Prelims: first census 1872, first complete 1881; 2011 density 382 (117 in 1951); Arunachal 17 and Delhi 11,297; the four phases and their dates (negative growth in 1911-21; 2.2% a year in 1951-81); main and marginal workers (183 days); work participation 39.8%; Grierson's 179 languages and 544 dialects; NCERT's language-family shares; National Youth Policy 2014 (youth = 15-29).

For Mains: describe a pattern, then explain it with NCERT's factors, then update it with a dated source.

Avoid: quoting Census 2011's provisional and final figures as if they were the same (literacy 74.04% vs 73.0%); writing that India's fertility is "at" replacement (it is below it on SRS 2024 and NFHS-6); and describing any census after 2011 as completed.

Practice Questions

Practice (UPSC-pattern, not past papers). Questions 1 to 4 are NCERT's own exercise MCQs; question 2 follows the 2026-27 reprint's options.

Prelims:

1. India's population as per the 2011 Census is:
   (a) 1,028 million
   (b) 3,182 million
   (c) 3,287 million
   (d) 1,210 million

2. Which one of the following States has the highest density of population in India?
   (a) West Bengal
   (b) Kerala
   (c) Uttar Pradesh
   (d) Bihar

3. Which one of the following States has the highest proportion of urban population in India according to the 2011 Census?
   (a) Tamil Nadu
   (b) Maharashtra
   (c) Kerala
   (d) Goa

4. Which one of the following is the largest linguistic group of India?
   (a) Sino-Tibetan
   (b) Indo-Aryan
   (c) Austric
   (d) Dravidian

5. Consider the following statements about the four phases of India's population growth (NCERT):
   

   1. India's population fell in the decade 1911-21.
      
   2. The period 1951-81 is called the period of population explosion.
      
   3. Growth slowed after 1981 mainly because the death rate rose.
      Which of the statements given above are correct?
      (a) 1 and 2 only
      (b) 2 and 3 only
      (c) 1 and 3 only
      (d) 1, 2 and 3

6. A marginal worker, as defined by the Census of India, is a person who works for:
   (a) less than 90 days in a year
   (b) less than 183 days in a year
   (c) less than 240 days in a year
   (d) only in the agricultural season

Answer notes: Q2, Bihar 1,102 against West Bengal 1,029 (the 2021-22 print had Punjab in place of Bihar, making West Bengal the answer); Q3, Goa was 62.2% urban; Q5, growth slowed because the birth rate fell.

Mains:

1. Discuss the spatial pattern of the density of population in India and the factors behind it. (250 words)
2. Give an account of the occupational structure of India's population. Why do some States have higher work participation rates than others? (250 words)
3. "Growth slowed after 1981, but the dividend is not automatic." Examine with reference to India's age structure. (150 words)

📦 Revision Capsule

Sources

• NCERT, India: People and Economy (Class XII), ch. 1 and Appendix (i), Tables 1.1-1.4 (2021-22 print) and Reprint 2026-27: 2021 book archive, Wayback copy; 2026-27 book archive.
• Census of India 2011, Primary Census Abstract highlights, chapters 1 and 3: chapter 1, Wayback copy; chapter 3, Wayback copy; State figures computed from the final PCA State tables.
• Office of the Registrar General of India, Sample Registration System Statistical Report 2024: SRS_STAT_2024.pdf.
• PIB (Ministry of Health and Family Welfare), release of the National Family Health Survey-6 (2023-24), 29 May 2026: pib.gov.in.
• UN DESA Population Division, World Population Prospects 2024, demographic indicators (medium variant): population.un.org/wpp.
• Ministry of Statistics and Programme Implementation, Periodic Labour Force Survey, annual report 2025, press note: PIB release.