1. Understanding Population Pyramids

2. What IS a Population Pyramid?
It is a bar graph that represents the distribution of the population by age and sex
In other words, how many males and females there are within different age groups in society.
Let’s examine some.

3. Population Pyramids 1

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5. What will the pyramid look like in 2025? 2050?1

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7. Age Dependency Ratio 1

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9. Aging population…
…declining birth rate 1

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12. How is this population pyramid different from Italy’s?

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14. Population Pyramids at Different Scales
Country
State
County (Borough)

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20. ACTIVITY for Selected Population Pyramids in the United States

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22. A. Ann Arbor, MI - University of Michigan
Helpful Hints…
A. Ann Arbor, MI - University of Michigan
B. Buffalo county, SD - Crow Creek Indian Reservation, one of the
poorest counties in the United States
C. Fort Bragg, NC - United States Army Fort
D. Leavenworth, KS - United States Penitentiary
E. Manhattan, NYC - wealthy downtown, few large families
F. Northhamton, MA - Smith College, an all girls college
G. Punta Gorda, FL - retirement community
H. Springfield, IL - average American city 1

23. Answers
1. B
2. A
3. E
4. C
5. G
6. H
7. F
8. D 1