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Australia vs New Zealand population, 1950 to 2100

Australia had 26.45 million people in 2023, versus 5.17 million in New Zealand. Compare UN estimates and projections to 2100.

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What the data shows

  • Australia: 8.18M in 1950, 43.14M in 2100 (projected) (5.3× higher). The latest estimate is 26.45M in 2023.
  • New Zealand: 1.91M in 1950, 5.81M in 2100 (projected) (3.0× higher). The latest estimate is 5.17M in 2023. It is projected to peak at 5.87M in 2074.

About this chart

The UN projects Australia to reach 43.14 million people in 2100, above its 2023 estimate of 26.45 million. At the estimated endpoint, Australia has 26.45 million people against 5.17 million for New Zealand. In 1950, the corresponding totals were 8.18 million for Australia and 1.91 million for New Zealand. All values are population totals, rather than population density or annual growth rates.

By 2100, the UN medium-variant projection reaches 43.14 million people for Australia and 5.81 million for New Zealand. Estimates end in 2023; later values are conditional projections rather than observed counts. Future fertility, mortality and migration can move the eventual totals away from this path. Comparing the same projection variant keeps the two countries on a consistent basis.

The data

Source: UN World Population Prospects 2024 via Our World in Data; estimates to 2023, medium-variant projections after, millions of people. Retrieved November 5, 2026. UN estimates through 2023; later years are medium-variant projections, not observed counts.

Australia vs New Zealand population, Millions of people, 1950–2100; projected after 2023, 1950–2100
Date🇦🇺 Australia🇳🇿 New Zealand
19508.18M1.91M
19518.42M1.95M
19528.63M2.00M
19538.82M2.05M
19549.00M2.10M
19559.21M2.14M
19569.42M2.18M
19579.64M2.23M
19589.85M2.28M
195910.06M2.33M
196010.28M2.38M
196110.50M2.43M
196210.71M2.48M
196310.91M2.54M
196411.13M2.59M
196511.36M2.64M
196611.59M2.68M
196711.81M2.72M
196812.03M2.75M
196912.27M2.78M
197012.60M2.82M
197113.00M2.87M
197213.30M2.92M
197313.52M2.98M
197413.72M3.04M
197513.89M3.09M
197614.05M3.13M
197714.20M3.14M
197814.37M3.14M
197914.53M3.14M
198014.72M3.15M
198114.95M3.16M
198215.19M3.19M
198315.41M3.22M
198415.62M3.25M
198515.84M3.27M
198616.07M3.28M
198716.32M3.30M
198816.59M3.32M
198916.87M3.33M
199017.13M3.40M
199117.35M3.48M
199217.55M3.53M
199317.72M3.57M
199417.90M3.62M
199518.10M3.67M
199618.31M3.73M
199718.50M3.78M
199818.70M3.81M
199918.91M3.84M
200019.13M3.86M
200119.37M3.89M
200219.60M3.95M
200319.82M4.02M
200420.05M4.08M
200520.29M4.14M
200620.59M4.18M
200720.95M4.22M
200821.37M4.26M
200921.78M4.30M
201022.14M4.35M
201122.48M4.38M
201222.85M4.41M
201323.24M4.45M
201423.60M4.52M
201523.95M4.61M
201624.33M4.71M
201724.73M4.81M
201825.12M4.90M
201925.48M4.99M
202025.74M5.07M
202125.96M5.11M
202226.20M5.13M
202326.45M5.17M
202426.71M5.21M
202526.97M5.25M
202627.23M5.29M
202727.47M5.32M
202827.72M5.35M
202927.96M5.38M
203028.19M5.41M
203128.42M5.43M
203228.64M5.46M
203328.86M5.48M
203429.08M5.50M
203529.30M5.52M
203629.51M5.54M
203729.73M5.56M
203829.94M5.58M
203930.15M5.60M
204030.36M5.62M
204130.57M5.64M
204230.79M5.65M
204331.00M5.67M
204431.22M5.69M
204531.43M5.70M
204631.65M5.71M
204731.87M5.72M
204832.08M5.74M
204932.30M5.75M
205032.51M5.76M
205132.72M5.77M
205232.92M5.78M
205333.13M5.79M
205433.33M5.80M
205533.54M5.80M
205633.75M5.81M
205733.95M5.82M
205834.16M5.82M
205934.36M5.83M
206034.56M5.83M
206134.76M5.84M
206234.97M5.84M
206335.18M5.84M
206435.38M5.84M
206535.58M5.85M
206635.78M5.85M
206736.00M5.85M
206836.21M5.86M
206936.42M5.86M
207036.64M5.86M
207136.84M5.86M
207237.04M5.86M
207337.25M5.86M
207437.45M5.87M
207537.66M5.87M
207637.87M5.87M
207738.07M5.87M
207838.28M5.87M
207938.49M5.87M
208038.70M5.86M
208138.91M5.86M
208239.13M5.86M
208339.34M5.86M
208439.55M5.85M
208539.76M5.85M
208639.97M5.85M
208740.19M5.84M
208840.42M5.84M
208940.65M5.84M
209040.88M5.84M
209141.11M5.84M
209241.34M5.83M
209341.57M5.83M
209441.80M5.83M
209542.02M5.83M
209642.24M5.83M
209742.48M5.82M
209842.71M5.82M
209942.93M5.82M
210043.14M5.81M

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Suggested caption: “UN 2100 projection: Australia 43.14M; New Zealand 5.81M.” Credit the source in your caption; it heads off the 'source?' comments.

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Frequently asked questions

Which country has more people, Australia or New Zealand?

Australia has more people in the 2023 UN estimates: about 26.45 million, compared with 5.17 million in New Zealand. The gap is approximately 21.28 million.

What populations are projected for 2100?

The UN medium-variant projection gives Australia 43.14 million people and New Zealand 5.81 million in 2100. These values are projections, not current population estimates.

Where do the estimates end and projections begin?

The UN World Population Prospects series uses estimates through 2023. Values from 2024 onward follow its medium-variant projection. Both countries use the same source and scenario.

Where does this data come from?

UN World Population Prospects 2024 via Our World in Data; estimates to 2023, medium-variant projections after, millions of people. Retrieved November 5, 2026. UN estimates through 2023; later years are medium-variant projections, not observed counts. You can download the full table as a CSV from this page.

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Related data

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WorldReal data

Australia's population

Australia: 26.45M in 2023; UN projects 43.14M in 2100. The 1950 estimate was 8.18M. Future values follow the medium scenario.

MoneyReal data

Australia's GDP

Australia GDP reached $1.8T in 2025. Its rank was 15 in 1980 and 15 in 2025. Current US dollars, not real growth.

CitiesReal data

Australia's largest cities

Sydney: 4.15M people in 2025, versus 2.22M in 1975. UN dense urban areas, not city limits. Post-2025 values are projections.