Human Settlements

Why this chapter matters for UPSC: Settlements are where human geography becomes visible on the ground: the shape of a village tells you about its water, roads and defence; the size and function of a town tell you about its economy. GS1 asks about urbanisation and its problems, and Prelims about settlement types, patterns and the vocabulary of cities (conurbation, megalopolis, million city). This chapter was dropped from NCERT's rationalised edition: the 2026-27 reprint of the book has eight chapters and none on settlements. Settlements in India are still covered in NCERT's India: People and Economy. BharatNotes keeps this world chapter because the exam has not dropped the topic.

Contemporary hook: The UN's World Urbanization Prospects 2025 redrew the list of the world's largest cities with a new, common definition of a city. On that basis Jakarta (nearly 42 million) is now the world's most populous city, followed by Dhaka (36.6 million) and Tokyo (33.4 million); New Delhi is fourth (30.2 million). The number of mega-cities of 10 million or more has quadrupled from 8 in 1975 to 33 in 2025, 19 of them in Asia, and is projected to reach 37 by 2050, including Hajipur in Bihar.

🧠 First Principles — Read This First

A settlement is a place inhabited more or less permanently, and its form records how people have used their environment. NCERT's definition allows houses to be rebuilt and functions to change while "settlement continues in time and space"; some settlements are temporary, occupied only for a season. The study of settlements is basic to human geography "because the form of settlement in any particular region reflects human relationship with the environment".

Rural and urban differ mainly in what people do, not only in how many there are. In villages most people work in primary activities (farming, fishing, lumbering, mining, animal husbandry); in towns the main occupations are secondary and tertiary. Population size matters but is "not a universal criterion": many villages in India and China are larger than towns in western Europe and the USA. Every country therefore draws the rural-urban line its own way, using size, occupation, administration or a mix. Once you see settlements as answers to the questions "where is the water, the land, the road, the defence, the market?", the patterns and the classifications become easy to remember.

PART 1 — Quick Reference

Rural Settlement Patterns (NCERT)

Factors in Siting Rural Settlements (NCERT)

What Makes a Place Urban? Thresholds by Country (NCERT)

NCERT quotes the Census of 1991 definition as a single sentence, but its own administrative paragraph shows how it works: a place with a municipality or similar body is urban whatever its size, and the three tests (5,000 people, 75% non-farm male workers, 400 per sq km) apply to places without one. The first route is administrative; the second rests on size, occupation and density.

The World's Largest Cities, 2025 (UN WUP 2025)

Source: UN DESA, World Urbanization Prospects 2025, Table A4 (cities as defined by the Degree of Urbanisation, 1 July 2025). NCERT's own Table 10.2 (UN data for 2016, on the older definitions) listed 31 mega-cities, with Tokyo first (38.1 million), Delhi second (26.5 million) and Mumbai fourth (21.4 million): the change in rank between the two lists comes largely from the change of definition, so compare cities only within one edition.

PART 2 — Concepts & Narrative

Rural and Urban: A Dichotomy That Blurs

There is "no consensus on what exactly defines a village or a town". Differences of function are more meaningful than size, but even these vary: a petrol pump is a low-order (village) function in the USA and an urban one in India, and what counts as a rare facility in a village of a developing country may be ordinary in a developed one. The line is blurring in developed countries, where many people who work in cities prefer to live in villages. NCERT names suburbanisation, the "new trend of people moving away from congested urban areas to cleaner areas outside the city in search of a better quality of living", with thousands commuting daily from suburbs to city jobs.

Types of Settlement by Shape

NCERT's two broad types:

• Compact or nucleated settlements: many houses built very close together, along river valleys and in fertile plains; communities are closely knit and share common occupations.
• Dispersed settlements: houses spaced far apart and often interspersed with fields; a cultural feature such as a place of worship or a market binds the settlement together.

Rural Settlement Patterns

Rural settlements are "most closely and directly related to land", dominated by primary activities and relatively small. NCERT classifies them by setting (plain, plateau, coastal, forest and desert villages), by function (farming, fishermen's, lumberjack and pastoral villages) and by form:

• Linear: houses along a road, railway line, river, canal, the edge of a valley or a levee.
• Rectangular: in plains or wide inter-montane valleys, with roads that cut each other at right angles.
• Circular: around lakes or tanks; sometimes planned with an open centre for keeping animals safe from wild animals.
• Star-like: where several roads converge, with houses built along the roads.
• T-shaped, Y-shaped and cross-shaped (cruciform): T-shaped at tri-junctions of roads; Y-shaped where two roads converge on a third; cruciform at crossroads, with houses extending in all four directions.
• Double village: settlements extending on both sides of a river where there is a bridge or a ferry.

The figure in Part 1 draws all six.

Problems of Rural Settlements

Rural settlements in developing countries are many and "poorly equipped with infrastructure". NCERT lists the problems: inadequate water supply, with long walks for drinking water in mountainous and arid areas and water-borne diseases such as cholera and jaundice; frequent drought and flood in South Asia; a general absence of toilets and garbage disposal; houses of mud, wood and thatch that are damaged in heavy rain and floods and lack ventilation, often sharing space with animal sheds; and unmetalled roads and poor communication that cut villages off in the rains and make health and education services hard to provide, especially where houses are scattered over a large area.

Urban Settlements: Growth and Classification

Rapid urban growth is recent. NCERT says London was the first city to reach one million people, but gives two dates: "by around A.D. 1810" in one paragraph and "in 1800" in another; both are NCERT's, and the safe answer is "around 1800-1810". By 1982 about 175 cities had passed a million. NCERT's Table 10.1 traces the urban share of the world's population: 3% in 1800, 6% in 1850, 14% in 1900, 30% in 1950, 37% in 1982, 48% in 2001 and 54% in 2017. The UN now puts it at 57.8% in 2025, on national definitions, rising to 67.3% by 2050 (WUP 2025).

NCERT classifies urban centres by population size, occupational structure and administration (Part 1 table), and examines their location by function: strategic towns need natural defence, mining towns minerals, industrial towns energy or raw materials, tourist centres scenery, beaches, medicinal springs or historic relics, and ports a harbour. The earliest towns were sited for water, building materials and fertile land; modern technology now lets towns grow far from these. Beyond the site, the situation matters: towns close to important trade routes grew fastest.

Functions of Towns

The earliest towns were centres of administration, trade, industry, defence and religion; defence and religion have declined as distinguishing functions, while recreation, residence, transport, mining, manufacturing and information technology have been added. Towns are named by their dominant function, though large cities are diverse and functions change (England's early nineteenth-century fishing ports turned to tourism; old market towns turned to manufacturing). NCERT's categories and examples:

Urbanisation is "the increase in the proportion of population of a country who live in urban areas"; its most important cause is rural-urban migration. NCERT notes that developed countries urbanised rapidly in the nineteenth century and developing countries in the second half of the twentieth.

Towns by Form: Two Planned Capitals

Urban form (linear, square, star or crescent) reflects history and culture. Most cities in developed countries are planned; most in developing countries grew historically with irregular shapes, though Chandigarh and Canberra are planned, and smaller Indian towns grew "from walled cities to large urban sprawls".

• Addis Ababa ("new flower") was established in 1878 on hill-valley topography; its roads radiate from the government headquarters at the Piazza, Arat and Amist Kilo roundabouts. Its Mercato is described as the largest market between Cairo and Johannesburg; it is an educational centre, the terminus of the Djibouti-Addis Ababa railway and a nodal centre in the middle of Ethiopia.
• Canberra was planned as Australia's capital in 1912 by the American landscape architect Walter Burley Griffin, as a garden city for about 25,000 people with five main centres; it has since added satellite towns with their own centres, and has wide open spaces, parks and gardens.

Town, City, Conurbation, Megalopolis

• Town: defined by contrast with a village: manufacturing, retail and wholesale trade and professional services exist in towns.
• City: a leading town that has outstripped its rivals; in Lewis Mumford's words, "the physical form of the highest and most complex type of associative life". Cities have transport terminals, major financial institutions and regional administrative offices; past one million people a city is a million city.
• Conurbation: a term coined by Patrick Geddes in 1915 for a large urban area formed when separate towns or cities merge: Greater London, Manchester, Chicago, Tokyo.
• Megalopolis: "great city" in Greek, popularised by Jean Gottmann (1957) for a super-metropolitan region formed by the union of conurbations; the best-known example stretches from Boston to south of Washington in the USA.

Million cities (NCERT): London (c. 1800), Paris (1850) and New York (1860) were the first; there were about 80 by 1950, 162 in the mid-1970s, 438 in 2005, 512 in 2016, and 662 projected for 2030. Mega-cities of over 10 million: New York was the first, by 1950, with about 12.5 million; NCERT counted 31 in 2016. The UN's 2025 count, on its new definition, is 33 (19 in Asia), up from 8 in 1975, with 37 projected by 2050.

Problems of Urban Settlements in Developing Countries

People flock to cities for jobs and amenities, but most cities in developing countries are unplanned, so congestion, housing shortages, vertical growth and slums follow. NCERT's figures (from the early 2000s): in most Indian million-plus cities "one in four inhabitants lives in illegal settlements", which grow twice as fast as the rest of the city, and around 60% of the urban population in Asia-Pacific countries lives in squatter settlements. NCERT groups the problems:

• Economic: falling job opportunities in rural and small urban areas push people to cities, creating a large pool of unskilled and semi-skilled labour that cities cannot absorb.
• Socio-cultural: too little money for social infrastructure; education and health care beyond the urban poor's reach; crime aggravated by unemployment; and male-selective migration that distorts the urban sex ratio.
• Environmental: shortage of potable water, poor sewerage, air pollution from traditional fuels, untreated domestic and industrial waste, and heat islands created by huge concrete structures.

Responses. The UNDP's "Urban Strategy" priorities (NCERT): shelter for the urban poor; basic services such as education, primary health care, clean water and sanitation; women's access to basic services; better energy use and alternative transport; and reduced air pollution. The WHO's healthy city has a clean and safe environment, meets the basic needs of all, involves the community in local government and provides easily accessible health services. NCERT closes on rural-urban linkages: rural population growth has outpaced rural jobs, so migration to cities strains urban services, and the answer lies in eradicating rural poverty and creating rural employment as well as in managing cities.

India's Urban Picture

India's 2011 census counted 37.71 crore urban people out of 121.06 crore, about 31.2%. On national definitions, the UN puts India at 35.7% urban in 2025 and projects 43.1% by 2050 (WUP 2025). On the UN's 2025 city definitions, India has three cities in the world's top 13 (New Delhi 4th, Kolkata 9th, Mumbai 12th), and Hajipur in Bihar is among the four cities projected to become mega-cities by 2050. In the GaWC research network's 2024 classification of "world cities" by their links in the global economy, Mumbai is an Alpha city, New Delhi Alpha-minus and Bangalore Beta-plus.

PART 3 — UPSC Integration

Frames that score. For a question on rural settlement patterns, define each pattern by the feature that shapes it (road, river, tank, crossroads, bridge) and give a sketch. For urban problems, use NCERT's three heads (economic, socio-cultural, environmental) and NCERT's solutions (UNDP priorities, the WHO healthy city, rural-urban linkages). For definitions of urban, always state the basis (size, occupation, administration), because the answer differs by country.

Dates and definitions. City rankings depend on how a city is drawn. NCERT's 2016 list and the UN's 2025 list use different definitions, so Tokyo's fall from first to third is mostly a matter of method; say which edition you are quoting.

Exam Strategy

For Prelims: Learn NCERT's six rural patterns and the double-village definition, wet and dry points, the country thresholds (India 5,000; Japan 30,000; the Nordic 250), the town-function examples, who coined conurbation (Geddes, 1915) and who popularised megalopolis (Gottmann, 1957), Canberra's planner (Walter Burley Griffin, 1912) and the UN's 2025 city ranks.

For Mains: Pair NCERT's frames with dated data from WUP 2025 and the 2011 census, and keep the site-situation distinction ready for questions on why some cities grew.

Avoid: the old claim that Tokyo is the world's largest city without naming the edition, and confusing a conurbation (merged towns) with a megalopolis (merged conurbations).

Practice Questions

Practice (UPSC-pattern, not past papers). Questions 1 to 3 are NCERT's own exercise MCQs.

Prelims:

1. Which one of the following forms of settlement develops along either side of roads, rivers or canals?
   (a) circular
   (b) linear
   (c) cross-shaped
   (d) square

2. Which one of the following types of economic activities dominates in all rural settlements?
   (a) primary
   (b) tertiary
   (c) secondary
   (d) quaternary

3. Sufficiency of which type of resources can help to create adequate social infrastructure catering to the needs of the large population in the developing countries?
   (a) financial
   (b) human
   (c) natural
   (d) social

4. In NCERT, a "double village" is a settlement that:
   (a) has two parallel rows of houses facing a road
   (b) extends on both sides of a river where there is a bridge or a ferry
   (c) has two centres, one religious and one commercial
   (d) develops where two roads converge on a third

5. Consider the following pairs of a term and the person associated with it:
   

   1. Conurbation : Patrick Geddes
      
   2. Megalopolis : Jean Gottmann
      
   3. Canberra's plan : Walter Burley Griffin
      How many of the pairs given above are correctly matched?
      (a) Only one
      (b) Only two
      (c) All three
      (d) None

6. According to the UN's World Urbanization Prospects 2025, which Indian city ranked highest among the world's most populous cities in 2025?
   (a) Mumbai
   (b) Kolkata
   (c) New Delhi
   (d) Bengaluru

Note: NCERT's exercise also asks how many Indian cities had a million people "at the beginning of 2006" and where "the oldest well-documented urban settlement" was found; the chapter's own text answers neither, so they are left out here.

Mains:

1. Distinguish between site and situation. How do they explain the growth of some towns and the decline of others? (150 words)
2. What are rural and urban settlements? Describe the patterns of rural settlement with the factors that produce each. (250 words)
3. Discuss the problems of urban settlements in developing countries and the strategies suggested to address them. (250 words)

📦 Revision Capsule

Sources

• NCERT, Fundamentals of Human Geography (Class XII), ch. 10 "Human Settlements", 2021-22 print: book archive, Wayback copy. Not in the Reprint 2026-27 edition: 2026 book archive.
• UN DESA Population Division, World Urbanization Prospects 2025: Summary of Results (2025), key findings, Tables A3 and A4: desapublications.un.org.
• Office of the Registrar General and Census Commissioner, Census of India 2011, Primary Census Abstract: Data Highlights, India, chapter 1, Statement 1: Wayback copy.
• Globalization and World Cities Research Network (GaWC), "The World According to GaWC 2024": gawc.lboro.ac.uk.