Chapter 16 — Population, migration, settlement and urbanisation

Exam fit: census concepts, population measures, migration and settlement patterns. Level: foundation to intermediate.

Human geography studies how people are distributed, how they move and how settlements organise space. Population density, growth, age composition, sex ratio and urbanisation are indicators with precise definitions. They depend on a reference date, geographic unit and denominator. A map can show broad patterns, but the apparent density of a shaded district does not reveal local variation or service access.

16.1 Population counts and census evidence

A population census is a complete enumeration carried out under a defined legal and methodological framework. It provides official counts and characteristics for a reference date, subject to coverage and data quality. India's most recently completed decennial census remains Census 2011; its Population Finder and Primary Census Abstract provide data by specified administrative units. A 2011 figure is a historic baseline, not a current population estimate.

The Government of India notified Census 2027. Official Gazette notifications set phase periods and reference dates; schedules may be amended, extended or separately notified for regions. As at this book's 11 October 2026 fact-check cutoff, Census 2027 operations were being carried out under dated official notifications, but no 2027 population results existed. Before using any later status, dates or results, check the latest Office of the Registrar General and Census Commissioner notification. Do not convert a projection or a news estimate into a census count.

16.2 Density, growth and distribution

Population density is population divided by land area, usually people per square kilometre. The result depends on which population and land-area definitions are used. A state average can conceal dense cities, sparsely populated hills, forests and deserts. Arithmetic density gives a broad comparison; it does not measure crowding in a neighbourhood or pressure on a specific water system.

Population change reflects births, deaths and migration. Natural increase is births minus deaths over a period; total change also includes net migration and boundary/measurement effects. Growth rates require two comparable dates and a stated calculation. A high growth rate does not necessarily mean a large population, and a large population can grow slowly.

16.3 Sex ratio, age structure and literacy

Sex ratio is a ratio with a defined numerator and denominator. In Indian Census publications, the general sex ratio is commonly expressed as females per 1,000 males; child sex ratio uses a specified age group. Always read the table heading. An apparently similar ratio may use another definition or population universe. These statistics describe populations; they should not be used to stereotype individuals or infer causes from one table.

Age structure divides population into age groups. It influences potential demand for schools, health services, jobs and pensions, but age composition alone does not predict employment or welfare. Literacy rates also have a defined age threshold and denominator in census tables; do not compare figures unless methods and populations align.

16.4 Migration: origin, destination and reason

Migration is a change in usual residence over a defined period or distance criterion. Census migration tables classify streams by place of birth or last residence, duration and reason, depending on the table. Rural-to-urban migration is one stream; urban-to-urban, rural-to-rural and inter-state movements also occur. People move for work, education, marriage, family, displacement, safety and other reasons.

Migration can be seasonal, circular or permanent. A person may move temporarily for work while maintaining a home elsewhere. Remittances support households, while migration can also expose workers to insecure housing, wage theft, health risks or separation from services. A district's net migration can be small even when large in- and outflows offset each other.

16.5 Rural and urban settlement

The Census classification of rural and urban settlements follows notified criteria. Census towns meet specified population, density and workforce conditions, while statutory towns are legally constituted urban local bodies. These categories should not be replaced with informal ideas like “large village.” Definitions can change between census rounds; read the reference period and table notes.

Urbanisation may be measured as the share of population in urban areas, the number of urban residents or the rate of change. These indicators differ. Urban growth includes natural increase, migration and reclassification. A settlement can acquire urban characteristics before becoming a municipality, while administrative status can change through notification.

Urban form reflects transport, land prices, jobs, institutions, terrain, water and planning. Cities can concentrate opportunity and also face housing shortages, pollution, heat, congestion and unequal service access. Urbanisation is not simply an increase in city names on a map.

16.6 Settlement hierarchy and services

Settlements form networks of villages, small towns, district centres and metropolitan hubs. Higher-order centres often provide specialised services over a wider catchment; lower-order centres provide daily needs close to residents. This hierarchy is not a rigid ladder: digital services, highways and local institutions can shift access. A service-area map should consider travel time and affordability, not only straight-line distance.

Population distribution and public services interact. Schools, hospitals, markets, policing and transport need staffing, financing and suitable sites. A population map can guide planning but should be combined with age, disability, income, hazard exposure and access data, with privacy safeguards for small groups.

16.7 Worked density and migration example

If a district has 2,400,000 residents in 12,000 km², its arithmetic density is 200 persons per km². That average does not mean every square kilometre has 200 people. If 40,000 people enter and 35,000 leave in the same period, net in-migration is 5,000, even though total flows are 75,000. Gross flow and net balance answer different questions.

Worked map workshop

Build a table with measure, numerator, denominator, unit and date. For density, use population divided by land area. For sex ratio, use the Census convention and note the population universe. For literacy, record age threshold. For urban share, identify the rural/urban classification. This prevents a common mistake: comparing two labels that use different denominators or census definitions.

India's latest completed decennial Census at the 11 October 2026 cutoff is Census 2011. Census 2027 has been notified and phase schedules are issued through official gazettes; no 2027 results exist at the cutoff. Update this note before later publication, because dates and region-specific schedules can change. Use official census releases and avoid presenting projections as enumerated counts.

Draw a settlement hierarchy as a network, not a rigid pyramid. A village may depend on a nearby town for secondary services and a larger city for specialised care. Road frequency, travel cost, digital access and service capacity matter. Dense population does not guarantee equal access; combine maps with age, disability, income and privacy-aware service data.

Chapter recall

• India's latest completed census data remain Census 2011; date every population statistic.
• Census 2027 is notified, but no population results exist as of this edition's cutoff; check later official notifications for schedule updates.
• Density = population ÷ area; a regional average hides within-area differences.
• Census sex ratio is conventionally females per 1,000 males; child sex ratio and other ratios have different universes.
• Urbanisation can reflect natural increase, migration and reclassification; rural/urban definitions are method-specific.

Population measures require a reference date, denominator and boundary.

Chapter practice MCQs

1. Population density is generally calculated as:

A. population divided by land area

B. births divided by longitude

C. land area divided by rainfall

D. households multiplied by river length

Answer: A. Density expresses population per unit area, usually persons per square kilometre.

2. India's latest completed decennial census data are from:

A. Census 2027 results

B. Census 2011

C. Census 2021 completed results

D. Census 2031 results

Answer: B. Census 2011 remains the latest completed census dataset as of this edition's dated fact check; Census 2027 results are not yet available.

3. Which phrase best describes a census count?

A. Any social-media estimate

B. A weather forecast

C. An official enumeration tied to a reference date and methodology

D. A mine production figure

Answer: C. Census counts are produced under defined legal and statistical procedures and have a stated reference date.

4. A 2011 population figure should be called:

A. the exact current population

B. a Census 2027 result

C. a daily estimate

D. a Census 2011 baseline

Answer: D. The date is part of the statistic; it should not be presented as current population.

5. Which statement about Census 2027 is correct as of the book's cutoff?

A. It is notified, but results are not yet available.

B. Final population results have already been released.

C. No official notification exists.

D. It is a rainfall normal.

Answer: A. Official notifications establish Census 2027 operations; population results do not exist as of 11 October 2026.

6. In Indian Census usage, the general sex ratio is commonly expressed as the number of:

A. males per 100 females

B. females per 1,000 males

C. females per 100 males

D. males per 1,000 females

Answer: B. Indian Census tables conventionally report the general sex ratio as females per 1,000 males. Always check whether a table instead defines a child sex ratio or another population universe.

7. Why should the latest Census 2027 schedule be checked before publication?

A. Census dates never change.

B. Population density changes the calendar.

C. Official phase notifications can be amended or extended.

D. Map projections set the schedule.

Answer: C. Gazette notifications and official Census pages can update schedules, so status must be dated.

8. If 2,400,000 people live in 12,000 km², arithmetic density is:

A. 20 persons per km²

B. 2,000 persons per km²

C. 28,800,000 persons per km²

D. 200 persons per km²

Answer: D. Divide 2,400,000 by 12,000 to obtain 200 persons per square kilometre.

9. A state-level average density can conceal:

A. dense cities and sparsely settled regions within the state

B. all within-state variation

C. the state's total area

D. the population denominator

Answer: A. A single average smooths over local differences in terrain, settlement and population.

10. Natural increase is broadly:

A. immigration minus emigration only

B. births minus deaths

C. population divided by area

D. urban population minus rural population

Answer: B. Natural increase excludes net migration; total population change also reflects migration and boundary/method effects.

11. Net migration is different from gross migration flows because net migration:

A. counts only births

B. is always greater than both flows

C. is the difference between in-migration and out-migration

D. measures population density

Answer: C. Large inward and outward flows can nearly cancel, leaving a small net balance.

12. Child sex ratio differs from the general sex ratio because it:

A. measures rainfall

B. excludes all females

C. counts cities only

D. uses a specified child age group

Answer: D. Age universe matters; the table heading defines the child group.

13. A high population growth rate does not necessarily mean:

A. the population is the largest in absolute terms

B. growth occurred over a stated interval

C. a rate was calculated

D. two dates were compared

Answer: A. Rate and absolute population size are different measures.

14. Which can contribute to urban population growth?

A. Longitude alone

B. Natural increase, migration and reclassification

C. Forest canopy alone

D. A port's draft depth

Answer: B. Urban population can grow through births minus deaths, migration and changes in classification/status.

15. A statutory town is generally identified through:

A. rainfall total alone

B. a river's mouth type

C. legal constitution as an urban local body

D. the soil's colour

Answer: C. Statutory towns are legally constituted; Census towns meet specified demographic/economic criteria.

16. Which source should support a current official population count?

A. A 2011 map presented as current

B. A crop calendar

C. A cyclone advisory

D. The latest released Census or authorised official estimate, clearly labelled

Answer: D. Use current official data and label whether it is a census count, projection or estimate.

17. Seasonal migration means movement that:

A. occurs for part of a year or season, with return or repeated movement possible

B. is always permanent

C. never involves work

D. is a population density formula

Answer: A. Seasonal or circular migration can involve temporary work and repeated movement.

18. A district can have large migration flows but small net migration when:

A. no one moves

B. inward and outward numbers are similar

C. all residents are counted twice

D. the land area is large

Answer: B. Net balance is the difference, so large opposite flows can offset.

19. Which statement about census migration tables is safest?

A. All migration measures are identical.

B. They count only international migration.

C. Definitions depend on whether place of birth, last residence or duration is used.

D. They never include reasons.

Answer: C. Census tables use defined concepts; read metadata before comparing.

20. A settlement hierarchy can describe:

A. a soil profile

B. a cyclone category

C. a river's gradient only

D. centres providing services to different-sized catchments

Answer: D. Villages, towns and larger centres provide different service ranges, subject to accessibility.

21. Why is straight-line distance an incomplete measure of access to a hospital?

A. Travel time, affordability, route, service capacity and transport availability matter.

B. Distance has no units.

C. Hospitals do not use roads.

D. Population maps show all treatment outcomes.

Answer: A. Practical access depends on network, cost, service and mobility conditions.

22. Which factor is not enough by itself to explain population distribution?

A. Employment opportunity

B. Latitude alone

C. Terrain and water

D. Transport and history

Answer: B. Distribution reflects interacting physical, economic, historical and institutional factors.

23. Which indicator has a denominator of land area?

A. Sex ratio

B. Literacy rate

C. Arithmetic population density

D. Net migration

Answer: C. Density divides population by area; other indicators use different denominators.

24. A literacy rate comparison requires checking:

A. port name

B. river direction

C. map font

D. age threshold, population denominator and reference method

Answer: D. Definitions and population universe must align for meaningful comparison.

25. Which statement about urbanisation is most accurate?

A. It involves changes in settlement population and classification, not merely more city labels.

B. It means only construction of highways.

C. It is identical to migration.

D. It can occur only in capitals.

Answer: A. Urbanisation is measured in multiple ways and reflects demographic and classification processes.

26. A population projection should be labelled as:

A. an exact enumeration

B. an estimate based on assumptions, not a census count

C. a legal boundary

D. a forest-cover statistic

Answer: B. Projections model future population under assumptions; they differ from enumerated census results.

27. Why should small-area population maps be handled with privacy care?

A. Maps cannot contain people.

B. Privacy applies only to roads.

C. Small groups can be identifiable when detailed data are combined.

D. Census data have no geographic detail.

Answer: C. Granular data can create disclosure risks; aggregation and safeguards protect residents.

28. Why should population comparisons across changed administrative boundaries be treated cautiously?

A. Boundary changes make population unmeasurable forever.

B. Density no longer uses land area.

C. Migration stops at a new boundary.

D. The geographic denominator may no longer represent the same area.

Answer: D. Comparable time series need harmonised boundaries or a clear explanation of the area change.