Grade by Grade
D. Changing Populations · Changing Populations: Canada's People, Patterns and Trends

Effects of Population Change: Economic, Social, Cultural, Political and Environmental

D2.1 A2.3About 70 minutes
Learning goals
  • I can analyse current economic, social, cultural, political and environmental effects of changes in Canada's population.
  • I can explain how the same change affects people differently in different communities.
  • I can predict future impacts of population change using projections and evidence.
  • I can analyse a current news story about population using the concepts of geographic thinking.

Words to know

labour shortage
When there are not enough qualified workers to fill the jobs available.
tax base
The total income, property and spending that governments can tax to pay for services.
projection
A calculation of what a population could look like in the future if certain assumptions hold.
electoral redistribution
Redrawing the boundaries and number of federal ridings (seats) after a census, so seats match population.
Greenbelt
Protected farmland, forests and wetlands around the Greater Golden Horseshoe in Ontario, where most development is restricted.
housing supply
The number of homes available to buy or rent.
informed citizen
A person who understands issues using reliable evidence and takes part in decisions, for example by voting or speaking at council meetings.

Hook: one number, many effects

In 2023 Canada's population grew by 1,271,872 people (Statistics Canada). Imagine adding a city the size of Calgary in one year. Every one of those people needed a home, many needed a school or a job, and some needed a doctor. Then in 2025, the population fell. Each change ripples through the economy, society, culture, politics and the environment. Geographers try to trace those ripples.

The big changes in Canada's population

  1. Ageing: 19.0% aged 65+ in 2021; baby boomers all 65+ by 2030.
  2. Growth driven by immigration, with sharp swings: record growth in 2023, a decrease in 2025.
  3. Growing diversity: 23.0% immigrants; about one in four people racialized; many languages.
  4. Urbanization and suburban growth: nearly three in four people in CMAs.
  5. Young, fast-growing Indigenous population (average age 33.6).
  6. Internal migration from expensive regions to more affordable ones.

(Statistics Canada, 2021 Census and population estimates.)

Effects of an ageing population: five lenses (examples)AgeingpopulationEconomicworker shortagesin some jobsSocialmore home careand caregivingCulturalgrandparents keeplanguages alivePoliticalolder votersshape prioritiesEnvironmentalhomes, transportchange
Geographers look at a change through five lenses. One trend, such as ageing, has effects in all of them.

Economic effects

  • Labour shortages: as baby boomers retire, sectors such as health care, construction and the skilled trades, trucking and teaching need many new workers. In 2021 there were only 81 people aged 15 to 24 for every 100 people aged 55 to 64 (Statistics Canada).
  • Pressure on public budgets: more spending on pensions (Canada Pension Plan, Old Age Security) and health care, with relatively fewer workers paying income tax.
  • Housing: fast growth in 2022 to 2024 increased demand for homes faster than builders could add them, contributing to high rents and prices. Slower growth eases demand, but also means fewer new workers and customers.
  • Immigrants fill jobs, start businesses and pay taxes; many have degrees, but some face barriers when their foreign credentials are not recognized.
Young people starting work vs. people near retirement0501001502002001966812021aged 15–24 per 100 aged 55–641966: more than 200 (drawn at 200). Source: Statistics Canada, 2021 Census (April 2022)
In 1966 there were more than 200 young people aged 15 to 24 for every 100 people nearing retirement. In 2021 there were only 81. Fewer people are entering the workforce than are about to leave it.

Social effects

  • More need for home care, long-term care, family doctors and caregivers (often unpaid family members).
  • Schools: fast-growing suburbs use portables and build new schools; some rural and northern schools close or combine grades as enrolment falls.
  • Settlement services, language classes and mental health supports are needed for newcomers.
  • Isolation: many seniors live alone; communities create programs to keep them connected.

Cultural effects

  • Multilingual communities: media, signs and services in many languages; festivals, food and faith communities reshape neighbourhoods.
  • Francophone minority communities outside Quebec are a shrinking share of the population, which is why the federal government sets targets for French-speaking immigrants.
  • A young Indigenous population is leading language and cultural revitalization, and Indigenous-led arts and media are growing.

Political effects

  • After each census, federal seats are redistributed. After the 2021 Census, the House of Commons grew from 338 to 343 seats for the 2025 federal election, with new seats in fast-growing Alberta (3), British Columbia (1) and Ontario (1).
  • Immigration levels and housing became major election issues.
  • Older people vote in large numbers, so governments pay attention to pensions and health care.

Environmental effects

  • New housing on the edges of cities can replace farmland, forests and wetlands. In 2022, Ontario removed some land from the Greenbelt for housing; after public criticism and investigations by the Auditor General and the Integrity Commissioner, the government reversed the decision in 2023.
  • More people and more driving can mean more greenhouse gas emissions, while compact, transit-oriented growth can lower emissions per person.
  • Growth increases demand for water, energy and waste services.
Worked example

Let's analyse one change through all five lenses

Analyse the effects of rapid population growth in a suburb of the Greater Toronto Area.

  1. Economic: high demand for homes raises prices; construction jobs grow; new stores open.
  2. Social: schools fill up (portables); more people need family doctors; long commutes reduce family time.
  3. Cultural: many newcomers bring new languages, places of worship, festivals and restaurants.
  4. Political: more residents means more seats and influence after redistribution; debates at council about density and transit.
  5. Environmental: farmland is paved; more cars on highways; stormwater runoff increases.
  6. Different people, different effects: builders and some homeowners gain; renters and first-time buyers struggle; farmers may sell land.

Rapid growth creates jobs and diversity but strains housing, schools, transportation and green space. Effects differ by group.

Predicting future impacts

Statistics Canada projections suggest:

  • The number of people aged 85+ could reach 2.7 million within 30 years (from about 861,000 in 2021).
  • The working-age share (15 to 64) could fall below 60% by 2051.
  • Immigrants could be 29.1% to 34.0% of the population by 2041.
  • The Indigenous population could reach 2.5 million to 3.2 million within 20 years.

Predictions depend on assumptions. Lower immigration targets (2026 to 2028) and record-low fertility could mean slower growth and faster ageing than earlier projections assumed.

Analysing current events (A2.3)

When you read a news story about population:

  1. What changed, where, and for whom? (spatial significance)
  2. Is it part of a trend? Look for data over several years. (patterns and trends)
  3. What other factors are connected? (interrelationships)
  4. Whose perspective is shown, and whose is missing? (geographic perspective: economic, social, environmental, political; and the views of different groups)
  5. What can an informed citizen do? Vote (when old enough), attend a council meeting, write to a representative, volunteer.
Hands-on activity

News analysis log

You need: two recent news articles about population (for example housing, immigration levels, long-term care, school crowding), paper or a document.

  1. For each article, write a one-sentence summary.
  2. Fill in the five lenses: which economic, social, cultural, political and environmental effects does it mention? Which lens is missing?
  3. Answer the five A2.3 questions in the tip above.
  4. Make a prediction: what will happen in 5 years if the trend continues?
  5. Check one statistic in the article against Statistics Canada.

Look for: accurate summaries, at least one missing lens identified, and a prediction supported by evidence from the article or this unit.

Just for fun

Demographers call the retirement of the baby boomers a "grey wave". Surfers are still waiting for it to show up at the beach.

Your turn

1

Name one economic and one social effect of Canada's ageing population.

2

How did the House of Commons change after the 2021 Census, and why?

3

Give one environmental effect of rapid suburban growth.

4

Why is the ratio of 81 young people (15 to 24) per 100 people aged 55 to 64 important?

5

Give one cultural effect of increasing immigration in a city.

6

What is a projection, and why should you be careful with it?

More practice: warm-up

1

Name the five lenses used to analyse effects.

2

By what year will all baby boomers be 65 or older?

3

What is a labour shortage?

4

What happened to Ontario's Greenbelt decision in 2023?

5

Name one projection for Canada's population.

More practice: on your own

1

Explain how fast population growth in 2022 to 2024 contributed to high housing costs.

2

How might the same population change (ageing) affect a rural town differently from a large city?

3

Why does the federal government set targets for French-speaking immigrants outside Quebec?

4

Give an example of a political effect of population change at the municipal level.

5

Why might lower immigration targets cause faster population ageing?

Challenge

1

Predict two impacts in your community by 2036 if the share of seniors keeps rising. Explain who benefits and who faces challenges.

2

Evaluate this statement: "Population growth is always good for the economy."

3

Use the concept of geographic perspective to explain why people might disagree about building homes on farmland near a city.

Check your understanding

Quiz

1.

Which is an economic effect of an ageing population?

2.

How many seats did the House of Commons have for the 2025 election after redistribution?

3.

In 2021, how many people aged 15 to 24 were there for every 100 people aged 55 to 64?

4.

Which is an environmental effect of rapid suburban growth?

5.

Which question uses the concept of geographic perspective?

6.

Why are population projections uncertain?

For parents and teachers

Big idea: D2.1 asks students to analyse current effects of population change (economic, social, cultural, political, environmental) on people in various communities and to predict future impacts. Analysing news practises A2.3.

Common difficulties:

  • Mixing up the lenses (for example calling seat redistribution "social").
  • Ignoring differences between groups. Ask "Who benefits? Who struggles?"
  • Treating projections as facts.

How to help: Read a local news story together about housing, schools, transit or health care and identify which lenses it uses. If there is a municipal meeting or public consultation in your area, look at the agenda together: this is A2.3 in action.