GeographyNCERT Class 12 · India: People and Economy

Population: Distribution, Density, Growth and Composition

How India's 1,210 million people (2011) are spatially distributed, how densely packed they are, how their numbers have grown over a century, and how they are socially composed by residence, language, religion and occupation.

⏱ 6 min readGS-I6 sections4 memory tricks

Why this matters for UPSC

Prelims loves the hard facts here — census firsts, density extremes, the four growth phases, the 1921 'Year of the Great Divide', and definitions like physiological vs agricultural density. For Mains this is core GS-I (population and associated issues, demographic dividend, urbanisation) and feeds resource-pressure, regional-imbalance and society debates. Data-based statements and matching questions are repeatedly drawn from this chapter.

Understand the chapter

India's Population & the Census as Data Source

India is the second most populous country after China with 1,210 million people (2011 Census) — more than North America, South America and Australia combined. Such a large base is often linked to pressure on limited resources and socio-economic problems. The sole comprehensive source of this data is the decennial Census.

Census held every 10 years (decennial); a Union subject conducted by the Registrar General & Census Commissioner under MHA.
First Census: 1872 (under Lord Mayo) — non-synchronous; first complete/synchronous Census: 1881 (under Lord Ripon).
Census Act, 1948 is the legal backbone of the operation.

Distribution: A Highly Uneven Pattern

Population is spread very unevenly. Uttar Pradesh has the largest population, followed by Maharashtra, Bihar and West Bengal; ten states together hold about 76% of India's people. Distribution reflects physical, socio-economic and historical factors acting together.

Physical factors: climate, terrain and water — hence dense North Indian Plains, deltas and coastal plains; sparse Himalayas, NE and western interiors.
Socio-economic/historical: settled agriculture, settlement history, transport, industrialisation, urbanisation.
Modifiers: irrigation (Rajasthan), minerals/energy (Jharkhand), transport (Peninsular states) raised once-sparse zones.
Low shares despite large area: J&K (1.04%), Uttarakhand (0.84%), Arunachal Pradesh (0.11%).

Density: Crude, Physiological and Agricultural

Density = persons per unit area; India's 2011 density is 382/sq km, up from 117 in 1951 — a rise of over 200 in fifty years. It ranges from just 17/sq km in Arunachal Pradesh to 11,297/sq km in NCT Delhi. Because crude density poorly captures pressure on farmland, two refined measures are used.

Physiological density = total population / net cultivated area.
Agricultural density = total agricultural population / net cultivable area.
Agricultural population = cultivators + agricultural labourers + their families.
High state densities: Bihar 1102, WB 1029, UP 828 (north); Kerala 859, TN 555 (peninsular).

Growth & the Four Phases

Growth is the change in numbers between two time points, expressed as a percentage; the annual growth rate is 1.64% (2011). It has a natural component (crude birth and death rates) and an induced component (migration); the chapter discusses only natural growth. Over a century, India passed through four distinct phases.

Phase I (1901-1921): Stagnant/stationary — high birth AND death rates; negative growth in 1911-21 (poor health, illiteracy, weak food distribution).
Phase II (1921-1951): Steady growth — mortality fell with better health/sanitation/transport; birth rate stayed high (despite Depression & WWII).
Phase III (1951-1981): Population explosion — sharp mortality fall + high fertility; avg annual growth ~2.2%; aided by planning and in-migration.
Phase IV (post-1981): High but decelerating — falling birth rate via higher mean age at marriage and female education.

Regional Variation, Adolescents & Youth Policy

Growth varies widely across space: southern states (Kerala, Karnataka, TN, AP, Odisha, Goa) grew under 20% in 1991-2001, with Kerala lowest at 9.4%, while a north-western to eastern belt grew 20-25%. In 2001-2011 almost all states slowed (Maharashtra fell most, 6.7 pp; AP least, 3.5 pp). Adolescents (10-19 yrs) are 20.9% (2011) — a high-potential but vulnerable group, prompting dedicated youth policy.

Adolescents: male 52.7%, female 47.3%; risks include early marriage, female illiteracy, dropouts, malnutrition, HIV/AIDS.
National Youth Policy (NYP-2014, Feb 2014): defines 'youth' as 15-29 years.
National Policy for Skill Development & Entrepreneurship, 2015: umbrella framework linking skilling to demand.

Population Composition: Rural-Urban

By residence, India is still largely rural — 68.8% live in villages (2011) — but the urban share (31.16%) is growing faster due to economic development and better health/hygiene driving rural-urban migration. Rural distribution and village size vary sharply across the country.

640,867 villages (Census 2011); 597,608 (93.2%) inhabited.
High rural %: Himachal Pradesh, Bihar; barely half rural: Goa, Mizoram.
UTs mostly low rural share except Dadra & Nagar Haveli (53.38%).
Village size: under 200 persons in NE hills/W. Rajasthan/Rann of Kachchh; up to ~17,000 in Kerala and parts of Maharashtra.

Key terms

Census: Decennial complete enumeration of population; India's primary, official source of demographic data.
Density of Population: Number of persons per unit area (per sq km); a crude measure of human-land relationship.
Physiological Density: Total population divided by net cultivated area — pressure of all people on actually farmed land.
Agricultural Density: Total agricultural population divided by net cultivable area — pressure of farmers on farmable land.
Natural Growth: Population change from crude birth rate minus death rate, excluding migration.
Induced Growth: Population change due to in- and out-migration (movement of people).
Population Doubling Time: Time a population takes to double itself at its current annual growth rate.
Year of the Great Divide: 1921 — after the only decade of negative growth (1911-21), India's population began steady, continuous rise.
Adolescent Population: Age group 10-19 years; 20.9% of India (2011), high-potential but vulnerable cohort.

Must-know facts exam-ready

India's population: 1,210 million (2011) — 2nd most populous after China; larger than N. America + S. America + Australia combined.
Decennial Census; first Census 1872 (Lord Mayo), first complete/synchronous Census 1881 (Lord Ripon); governed by Census Act, 1948.
Ten states hold ~76% of population; order of top four: UP > Maharashtra > Bihar > West Bengal.
Density 382/sq km (2011), up from 117 (1951); range 17/sq km (Arunachal Pradesh) to 11,297/sq km (NCT Delhi).
Physiological density = population / net cultivated area; Agricultural density = agricultural population / net cultivable area.
Annual growth rate 1.64% (2011); decadal growth g = (P2 - P1)/P1 x 100.
1921 = Year of the Great Divide; 1911-1921 recorded negative growth (-0.31%).
Phase III (1951-1981) = population explosion, average annual growth ~2.2%.
Kerala registered the lowest decadal growth rate (9.4%), the lowest in the country.
Rural population 68.8%, urban 31.16% (2011); India has 640,867 villages, 597,608 (93.2%) inhabited.
NYP-2014 (launched Feb 2014) defines 'youth' as 15-29 years; adolescents (10-19) = 20.9% (2011).
World Development Report projection: India's population to touch 1,350 million by 2025.

Timeline

1872First Census of India (non-synchronous, under Lord Mayo).
1881First complete/synchronous Census (under Lord Ripon).
1901-1921Phase I: stagnant phase; negative growth in 1911-21.
1921Year of the Great Divide — steady population rise begins.
1921-1951Phase II: steady growth as mortality falls.
1951-1981Phase III: population explosion, ~2.2% annual growth.
Post-1981Phase IV: high but decelerating growth (falling birth rate).
2014National Youth Policy launched (youth = 15-29 years).

Memory tricks remember it for good

'Some Students Eat Daily'

Stagnant (1901-21) > Steady (1921-51) > Explosion (1951-81) > Decelerating (post-1981).

💡 Recall the four phases of India's population growth in correct order.

'U Must Be Wise'

UP, Maharashtra, Bihar, West Bengal.

💡 Recall the top four states by population in descending order.

'Cultivated = Physio, Cultivable = Agri'

Physiological density uses net CULTIVATED area; Agricultural density uses net CULTIVABLE area (with agricultural population on top).

💡 Stop swapping the two density formulas.

'Delhi Dense, Arunachal Airy'

Delhi 11,297/sq km is highest; Arunachal Pradesh 17/sq km is lowest.

💡 Lock in the 2011 density extremes.

Traps to avoid

First Census (1872, Lord Mayo) is NOT the first complete/synchronous Census (1881, Lord Ripon) — both years are tested.
Physiological vs Agricultural density: different denominators (net cultivated vs net cultivable) AND agricultural density uses agricultural population, not total population.
The Great Divide is 1921, and the negative-growth decade is 1911-1921 — not 1901 or 1901-1911.
Lowest growth (Kerala 9.4%) does not mean low density — Kerala's density is a high 859/sq km.
Adolescents = 10-19 years (20.9%) but NYP-2014 'youth' = 15-29 years — distinct age bands.
Highest-population state (UP) is NOT the highest-density unit (Delhi overall; Bihar 1102 among major states) — distribution and density differ.

Exam focus

🧠 Prelims angles

Census firsts (1872 vs 1881), decennial nature, Census Act 1948, Census as a Union subject.
Density 2011 figures and extremes (Delhi highest, Arunachal lowest) and major state densities.
The four growth phases and the 1921 Year of the Great Divide / negative-growth decade.
Definitions/formulas: crude vs physiological vs agricultural density; decadal growth formula.
NYP-2014 youth age group (15-29) and adolescent share (20.9%).
Rural (68.8%) vs urban (31.16%) shares and number of villages (640,867; 93.2% inhabited).

✍️ Mains angles GS-I

Account for the highly uneven distribution of population in India.Classify into physical (climate, terrain, water) and socio-economic/historical (agriculture, settlement, transport, industrialisation, urbanisation) factors with regional examples like Rajasthan, Jharkhand, Peninsular states.
India's demographic dividend rests on its adolescents and youth — opportunity or liability?Use 20.9% adolescent share, list vulnerabilities (female illiteracy, dropouts, health), then link NYP-2014 and Skill Development Policy 2015 as channelising responses.
The 1951-81 'population explosion' was a by-product of development.Argue via sharp mortality decline + sustained high fertility + centralised planning + in-migration, framed against the demographic transition.

Practice Geography questions from this syllabus →

Last-minute revision tick as you recall

1,210 million (2011); 2nd after China; > N. + S. America + Australia.
Census decennial; 1872 first, 1881 first complete; Census Act 1948.
Ten states = ~76%; UP > Maharashtra > Bihar > WB.
Density 382 (2011) vs 117 (1951); Delhi 11,297 high, Arunachal 17 low.
Two refined densities: physiological (net cultivated), agricultural (net cultivable).
Growth 1.64% (2011); four phases; 1921 = Great Divide, 1911-21 negative.
Phase III (1951-81) explosion @ ~2.2%; Kerala lowest growth 9.4%.
Rural 68.8%, Urban 31.16%; 640,867 villages (93.2% inhabited).
NYP-2014: youth 15-29; adolescents 10-19 = 20.9%; projected 1,350 million by 2025.

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Distilled from NCERT Class 12 · India: People and Economy for UPSC. Always cross-check facts with the original NCERT.