Imagine you plan schools for a growing suburb, or long-term care homes for a small town in Newfoundland. You need to know not just how many people live there but how old they are. Children need schools and daycare; working-age adults need jobs and housing; seniors need health care, accessible transit and pensions. One graph shows all of this at a glance: the population pyramid. By 2026, one Canadian in five was 65 or older, and Canada's pyramid looked less like a pyramid every year.
Reading a population pyramid
A population pyramid is two horizontal bar graphs placed back to back. The vertical axis shows age groups (usually five-year groups: 0–4, 5–9, and so on), youngest at the bottom. Males are on one side and females on the other, and the bar length shows the percentage (or the number) of the population in that group. Each bar is a cohort: people born in the same few years. As time passes, each cohort moves up the pyramid, getting a little smaller as people die, and bigger or smaller as people move in or out.
| Shape | What it looks like | What it tells you | Example |
|---|---|---|---|
| Expansive | A true pyramid: wide base, narrowing quickly toward the top | High birth rate, shorter life expectancy, fast growth, young population | Nigeria and many other countries in sub-Saharan Africa |
| Stationary (stable) | A column or beehive: similar-sized bars up to old age | Low birth and death rates that roughly balance; slow or no growth | Countries that have had low but steady births for a long time |
| Constrictive | Narrower at the bottom than in the middle | Birth rate below replacement, long life expectancy, aging population; it may shrink without immigration | Japan, Italy, and increasingly Canada |
Canada's pyramid: the baby boom and after
Canada's pyramid carries the fingerprints of its history. After the Second World War, birth rates soared: the baby boom, usually dated 1946 to 1965, produced a huge bulge of people. In 2026 the boomers are about 60 to 80 years old, so the bulge sits near the top of the pyramid, and by the end of 2030 every boomer will be 65 or older. After 1965 birth rates dropped (the baby bust), then rose a little when boomers had their own children (the echo boom, mostly the 1980s and early 1990s). Since then the fertility rate has kept falling, to a record low of 1.25 in 2024, so the base of the pyramid is narrow. Immigration fills out the bars for ages 20 to 44, because most immigrants arrive as young adults. At the very top, women outnumber men: in 2023 life expectancy at birth was about 83.9 years for females and 79.5 for males (Statistics Canada).
The dependency ratio
Geographers often split a population into three groups: children (0–14), the working-age population (15–64) and seniors (65 and over). The dependency ratio compares the two groups who usually depend on others for income (children and seniors) with the group who usually work and pay most of the taxes. It is written as dependents per 100 people of working age. You can also split it into a youth dependency ratio (children only) and an old-age dependency ratio (seniors only). The median age is the age that splits the population in half: half are older, half are younger.
| Population | Ages 0–14 | Ages 65+ | What it means |
|---|---|---|---|
| Canada (July 1, 2026 estimate) | 15.0% | 20.0% | Old-age dependency is now larger than youth dependency; demand for health care and pensions rises |
| Newfoundland and Labrador (2021 census) | Low | 23.6%, the highest of any province in 2021 | Oldest province: young people have moved away for work, and fertility is low; by July 1, 2026, 25.7% of people there were 65 or older |
| Nunavut (2021 census) | 32.8% | 4.4% | Youngest territory: high fertility and a young Inuit population; huge need for schools, housing and jobs for young people |
| Indigenous people in Canada (2021 census) | 25.4% (vs 16.0% of non-Indigenous people) | Lower | Average age 33.6 years vs 41.8 for non-Indigenous people; the population is young and grew 9.4% from 2016 to 2021, faster than the non-Indigenous population (5.3%) |
| Prairie provinces (2021 census) | Higher than seniors | Lower than children | The only provinces that still had more children than seniors in 2021 |
- A wide base means many children: plan for schools, daycare and pediatric care, and later for jobs and housing for young adults.
- A bulge in the middle means a large working-age group: a strong labour force now, but a big wave of retirements later.
- A wide top means many seniors: plan for health care, long-term care, accessible housing and transit, and pensions.
- A dent in one age group can signal a past event: a war, a low-birth period or many young people moving away.