Population: Distribution, Density, Growth and Composition

India's Population Distribution: • India had a population of 1.21 billion in 2011 (Census) and surpassed 1.4 billion by 2023 — making it the world's most populous country (surpassing China). • India's population is highly unevenly distributed across its 28 states and 8 Union Territories. Densely Populated Areas: • Indo-Gangetic Plain (Uttar Pradesh, Bihar, West Bengal, Punjab, Haryana): The most densely populated region — alluvial soils, assured water supply, flat terrain support intensive agriculture and dense settlement. • West Bengal: Highest population density among large states (over 1,000/km²). • Kerala and Tamil Nadu: Dense coastal populations. Sparsely Populated Areas: • Himalayan states (Himachal Pradesh, Uttarakhand, Arunachal Pradesh): Mountainous terrain, difficult access, thin soils. • Rajasthan and Gujarat (Thar Desert): Low rainfall, dry conditions. • Northeast states (Mizoram, Nagaland, Sikkim): Hilly, forested terrain; limited connectivity. Factors Explaining Distribution: Physical Factors: • Relief: Plains support dense population; mountains, plateaus, and deserts support sparse population. • Soil: Fertile alluvial soils of the Ganga plain support dense agrarian populations. • Climate: Adequate rainfall supports agriculture and settlement; desert and high-altitude areas are unattractive. • Water: Rivers and groundwater availability are crucial — river valleys are densely settled. Socio-Economic Factors: • Agriculture: Irrigated, high-productivity agricultural areas are densely settled (Punjab, UP, West Bengal). • Industrialisation and urbanisation: Mumbai Metropolitan Region, Delhi NCR, Kolkata attract millions. • Transport: Well-connected areas attract more settlement. • Historical: Ancient civilisation centres (Ganga valley, coastal Tamil Nadu) retain dense populations. Population Density: • National average (2011): 382 persons/km². • Highest density: West Bengal, Bihar, Kerala, UP. • Lowest density: Arunachal Pradesh (17/km²), Mizoram, Himachal Pradesh.

Population Growth Trend in India: Historical Phases: Phase 1 — Slow growth (before 1921): • Population grew very slowly — high birth rates were roughly offset by high death rates (famines, epidemics, plague). • 1921 is known as the 'Year of Great Divide' — the point where population growth began to accelerate decisively. Phase 2 — Rapid growth (1921–1951): • Death rates began falling (control of epidemics, improved food supply). • Birth rates remained high. • Population grew from 251 million (1921) to 361 million (1951). Phase 3 — Population explosion (1951–1981): • Death rates fell rapidly due to: independence, healthcare investment, Green Revolution, control of malaria and smallpox. • Birth rates remained high. • Population grew from 361 million (1951) to 683 million (1981). • Highest annual growth rate: About 2.2% (1971–81). Phase 4 — Declining growth rate (1981–present): • Birth rates began falling — due to urbanisation, education (especially of women), family planning, rising aspirations. • Death rates continued to fall. • Population growth is slowing — but the absolute numbers added are still large. • India's Total Fertility Rate (TFR) reached the replacement level (2.1) around 2020–21 nationally. Demographic Transition in India: • India is in Stage 3 of the demographic transition — declining birth rates, low death rates. • Regional variation: Southern states (Kerala, Tamil Nadu, Andhra Pradesh) are in or near Stage 4 (TFR ≤ 2.1). • Northern states (Bihar, UP, MP, Rajasthan) are still in Stage 2/3 with higher TFRs. • Kerala model: High literacy (especially female), good healthcare, low infant mortality = low fertility. Key Population Indicators (2011 Census): • Population: 1.21 billion. • Annual growth rate: 1.64%. • Birth rate: 20.2 per 1,000. • Death rate: 6.4 per 1,000. • Infant Mortality Rate: 44 per 1,000 live births. • Life expectancy: 67 years.

India's Population Composition: 1. Age Structure: • India has a young population — about 28% below 14 years; about 63% in working age (15–64). • The 'demographic dividend': India has a large working-age population relative to dependents — if employed productively, this drives economic growth. • Challenges: Youth unemployment; need for massive investment in education and skill development. • Ageing: India's population is ageing gradually — old-age dependency will increase in coming decades. 2. Sex Ratio: • 2011 Census: 943 females per 1,000 males — below world average. • Historical trend: Declining sex ratio through the 20th century due to son preference, female infanticide, and neglect of girls' health. • Child Sex Ratio (0–6 years, 2011): 919 — worse than overall, indicating female foeticide. • Regional variation: Kerala has the highest sex ratio (1084) — reflecting women's high educational attainment and social status; Haryana has one of the lowest (879). • Causes of low sex ratio: Son preference (patriarchal society), dowry burden, female foeticide (use of ultrasound to determine sex and abort female foetuses), neglect of girls' health. • PC-PNDT Act (1994): Prohibits sex-determination tests — but enforcement is weak. 3. Literacy: • 2011: National literacy rate — 74.04% (Males: 82.14%, Females: 65.46%). • Highest literacy: Kerala (94%), Mizoram, Goa. • Lowest literacy: Bihar (63.8%), Arunachal Pradesh, Rajasthan. • Gender gap: Female literacy lags male literacy in most states — especially in northern, rural India. • Sarva Shiksha Abhiyan and Right to Education Act (2009) have improved enrolment. 4. Occupational Structure: • 2011: Primary sector — ~49% of workers; Secondary — ~24%; Tertiary — ~27%. • Declining primary sector share (from 70%+ in 1951) — but still very high by developed-country standards. • Rural workforce predominantly in agriculture; urban workforce in industry and services. • Unemployment and underemployment: Many agricultural workers are seasonally or disguisedly unemployed.