World Population PyramidAge structures, made legible
Menu
CountriesRegionsCompareRankingsLearn

Australia population pyramid 2100

43,143,685 people in 2100 (UN medium projection). This page shows Australia’s age and sex structure in 2100 and how it differs from 2026.

2100 population
43.1MUN medium projection
Median age
44.8 years2026: 38.5
Under age 15
14.8%2026: 17.5%
Age 65+
28.4%2026: 18.5%

Australia population pyramid

2100 · Share of total by five-year age group and sex

Medium projection
Australia population pyramid for 2100: males on the left and females on the right Male share Female share 100+ males: 30,244 (0.1%) 100+ females: 60,456 (0.1%) 100+ 95–99 males: 185,591 (0.4%) 95–99 females: 296,930 (0.7%) 95–99 90–94 males: 535,595 (1.2%) 90–94 females: 696,064 (1.6%) 90–94 85–89 males: 832,306 (1.9%) 85–89 females: 945,183 (2.2%) 85–89 80–84 males: 972,441 (2.3%) 80–84 females: 1,031,701 (2.4%) 80–84 75–79 males: 1,065,692 (2.5%) 75–79 females: 1,097,119 (2.5%) 75–79 70–74 males: 1,107,352 (2.6%) 70–74 females: 1,122,693 (2.6%) 70–74 65–69 males: 1,125,344 (2.6%) 65–69 females: 1,130,388 (2.6%) 65–69 60–64 males: 1,165,552 (2.7%) 60–64 females: 1,162,591 (2.7%) 60–64 55–59 males: 1,214,214 (2.8%) 55–59 females: 1,204,269 (2.8%) 55–59 50–54 males: 1,245,492 (2.9%) 50–54 females: 1,230,501 (2.9%) 50–54 45–49 males: 1,263,499 (2.9%) 45–49 females: 1,244,782 (2.9%) 45–49 40–44 males: 1,277,458 (3.0%) 40–44 females: 1,255,428 (2.9%) 40–44 35–39 males: 1,286,595 (3.0%) 35–39 females: 1,261,589 (2.9%) 35–39 30–34 males: 1,294,335 (3.0%) 30–34 females: 1,265,460 (2.9%) 30–34 25–29 males: 1,295,718 (3.0%) 25–29 females: 1,261,223 (2.9%) 25–29 20–24 males: 1,231,991 (2.9%) 20–24 females: 1,191,735 (2.8%) 20–24 15–19 males: 1,117,457 (2.6%) 15–19 females: 1,073,479 (2.5%) 15–19 10–14 males: 1,097,186 (2.5%) 10–14 females: 1,051,068 (2.4%) 10–14 5–9 males: 1,089,472 (2.5%) 5–9 females: 1,041,272 (2.4%) 5–9 0–4 males: 1,068,496 (2.5%) 0–4 females: 1,017,721 (2.4%) 0–4 10%5% Age 5%10%

Download this population pyramid

Use the publication-ready SVG, create a high-resolution PNG, or download the complete age-by-sex dataset.

SVG CSV data

Projection

Values for 2100 come from the UN World Population Prospects 2024 medium scenario. They depend on assumptions about fertility, mortality, and migration and are not forecasts guaranteed to occur.

Australia age structure in 2100

In 2100, children under 15 are projected to make up 14.8% of the population, people aged 15–64 56.9%, and people aged 65 or older 28.4%. On these shares the structure is classed as older; see the guide to constrictive population pyramids.

The total age dependency ratio is projected to be 75.8 (25.9 children and 49.9 people aged 65+ per 100 aged 15–64). The largest five-year groups are 30–34, 25–29, 35–39, which together account for 17.8% of the population.

Fertility is projected to be 1.63 births per woman and life expectancy at birth 92.6 years. The population is projected to change by +0.50% during the year.

Australia in 2100 compared with 2026

Between 2026 and 2100, the medium scenario has Australia’s population growing by 58% and the median age rising by 6.3 years. The table sets the two years side by side; percentage-point differences compare shares, not counts.

Indicator20262100Change
Population27,227,09643,143,685+58.5%
Median age (years)38.544.8+6.3
Under 1517.5%14.8%−2.7 pts
Aged 15–6464.0%56.9%−7.1 pts
Aged 65+18.5%28.4%+9.9 pts
Fertility rate1.641.63−0.01
Life expectancy (years)84.392.6+8.3
Males per 100 females98.599.4+0.9

Australia population by age and sex in 2100

Counts by five-year age group, with everyone aged 100 or older combined. Download the CSV for every chart year.

Age groupMaleFemaleTotalShare
0–41,068,4961,017,7212,086,2174.8%
5–91,089,4721,041,2722,130,7444.9%
10–141,097,1861,051,0682,148,2545.0%
15–191,117,4571,073,4792,190,9365.1%
20–241,231,9911,191,7352,423,7265.6%
25–291,295,7181,261,2232,556,9415.9%
30–341,294,3351,265,4602,559,7955.9%
35–391,286,5951,261,5892,548,1845.9%
40–441,277,4581,255,4282,532,8865.9%
45–491,263,4991,244,7822,508,2815.8%
50–541,245,4921,230,5012,475,9935.7%
55–591,214,2141,204,2692,418,4835.6%
60–641,165,5521,162,5912,328,1435.4%
65–691,125,3441,130,3882,255,7325.2%
70–741,107,3521,122,6932,230,0455.2%
75–791,065,6921,097,1192,162,8115.0%
80–84972,4411,031,7012,004,1424.6%
85–89832,306945,1831,777,4894.1%
90–94535,595696,0641,231,6592.9%
95–99185,591296,930482,5211.1%
100+30,24460,45690,7000.2%

Use this chart in your work

Charts and tables may be reused with attribution. Please link to this page and credit the United Nations as the data source.

Embed the population pyramid

Cite this page

APA

World Population Pyramid. (2026, September 28). Australia Population Pyramid 2100. https://worldpopulationpyramid.com/countries/australia/2100/

MLA

“Australia Population Pyramid 2100.” World Population Pyramid, 28 Sept. 2026, worldpopulationpyramid.com/countries/australia/2100/.

Chicago

World Population Pyramid. “Australia Population Pyramid 2100.” Last modified September 28, 2026. https://worldpopulationpyramid.com/countries/australia/2100/.

Underlying data: United Nations, Department of Economic and Social Affairs, Population Division (2024). World Population Prospects 2024.

Frequently asked questions

What is the projected population of Australia in 2100?

UN World Population Prospects 2024 projects Australia's population in 2100 at 43,143,685 under the medium scenario.

What will be the median age in Australia in 2100?

The median age is projected to be 44.8 years, compared with 38.5 years in 2026.

What share of Australia is projected to be under 15 or 65+ in 2100?

14.8% are projected to be under 15 and 28.4% aged 65 or older, giving a total age dependency ratio of 75.8.

Sources and notes