Is the Amazon Rainforest Bigger Than Australia?

The Amazon rainforest is the largest tropical forest on Earth — but is it actually bigger than Australia, a country that takes up an entire continent? The answer matters because both are often compared loosely in conversation: "an area the size of Australia is being deforested" or "the Amazon is bigger than most countries." Let's settle it with the numbers.

The Short Answer

No, Australia is bigger than the Amazon rainforest. Australia covers about 7.692 million km². The Amazon rainforest covers approximately 5.5 million km². Australia is roughly 40% larger than the Amazon. But the comparison is closer than most people realize.

Side-by-Side Numbers

• Amazon rainforest area: ~5,500,000 km² (~2,124,000 sq mi)
• Australia (country/continent): 7,692,024 km² (2,969,907 sq mi)
• Difference: Australia is ~2.2 million km² larger
• Ratio: Australia is ~1.4× the size of the Amazon

The Amazon Rainforest

The Amazon rainforest is the largest tropical rainforest in the world. It spans 9 countries: Brazil (about 60%), Peru, Colombia, Venezuela, Ecuador, Bolivia, Guyana, Suriname, and French Guiana. The forest sits in the Amazon Basin, which is drained by the Amazon River — the largest river on Earth by discharge. The rainforest is estimated to contain about 390 billion individual trees representing 16,000 different species.

The Amazon is responsible for roughly 20% of the planet's oxygen production via photosynthesis (often quoted as such, though the net contribution to atmospheric oxygen is much lower because the forest also consumes oxygen via respiration and decay). It holds an estimated 76–100 billion metric tons of carbon, making its preservation critical to global climate stability. Deforestation has eliminated approximately 17% of the Amazon's original area since 1970, and current rates remain alarming despite international attention.

Australia

Australia is unusual: it is simultaneously a country, a continent, and the world's largest island (if you accept the continent-island framing). It is the 6th largest country by area, dramatically larger than India (3.3 million km²) but smaller than Brazil (8.5 million km²). The country's population is just 26 million, giving it one of the lowest population densities of any major country at about 3 people per km².

Geography varies enormously across Australia. The Outback — Australia's vast interior — is dominated by deserts and semi-arid grasslands. The Great Dividing Range runs along the entire east coast, separating the coastal strip (where 80%+ of the population lives) from the interior. Tropical rainforests exist in northern Queensland (the Daintree, one of the oldest rainforests on Earth), but they make up only a tiny fraction of Australia's total area.

Biodiversity Comparison

The Amazon hosts perhaps 10% of all known species on Earth — somewhere between 2.5 and 3 million species. About 40,000 plant species, 1,300 bird species, 3,000 fish species, 430 mammal species, and 2.5 million insect species call it home. Many remain undocumented; new species are discovered there every year.

Australia's biodiversity is profoundly different. Because the continent has been isolated for 50+ million years, the species that evolved there are unique — marsupials (kangaroos, koalas, wombats, possums), monotremes (platypus, echidnas), unique birds (lyrebirds, kookaburras, cassowaries), reptiles (more snake species than any other continent), and Eucalyptus-dominated forests. Roughly 87% of Australia's mammal species, 93% of its reptiles, and 94% of its frogs are found nowhere else.

Climate

The Amazon has a tropical climate. Average temperatures stay between 25–28°C year-round. Rainfall varies from 1,500 mm to over 3,000 mm annually, with a wet season (December–May) and a slightly drier season (June–November). Humidity is consistently high, often above 80%.

Australia spans a huge range of climates due to its size and latitude span. The north has tropical monsoon climate (Darwin, Cairns). The interior is arid desert. The south has Mediterranean (Perth, Adelaide), temperate (Melbourne, Hobart), and humid subtropical (Sydney, Brisbane) climates. Drought, bushfires, and tropical cyclones are major hazards. The 2019–2020 "Black Summer" bushfires burned over 18 million hectares — an area larger than England.

Human Population and History

The Amazon is sparsely populated relative to its size. Approximately 30 million people live in the broader Amazon Basin, with hundreds of indigenous groups including some uncontacted tribes. Manaus, in central Brazilian Amazonia, is the largest city at about 2.2 million people. Indigenous Amazonian cultures developed sophisticated horticultural and agroforestry systems — recent archaeological evidence suggests pre-Columbian Amazon populations were larger than previously thought, with terra preta (anthropogenic dark earth soils) and earthwork networks indicating substantial settlement.

Australia has been continuously inhabited by Aboriginal and Torres Strait Islander peoples for at least 65,000 years — one of the longest continuous cultures on Earth. European colonization began in 1788 with the British penal colony at Sydney Cove. Modern Australia is highly urbanized, with Sydney, Melbourne, Brisbane, Perth, and Adelaide together holding most of the population.

Economic Importance

The Amazon's economic value is famously contested. Sustainable extraction (rubber, Brazil nuts, açaí, ecotourism) competes with destructive extraction (cattle ranching, soy farming, logging, mining, illegal gold). The forest's services — carbon storage, rainfall generation, biodiversity — are estimated to be worth hundreds of billions of dollars annually but are not captured in conventional GDP measures. Australia's economy is dominated by mining (iron ore, coal, gold, lithium), agriculture (wheat, beef, wool), services, and tourism. The country has one of the highest GDPs per capita in the world.

Deforestation and Land Use Change

The Amazon has lost roughly 17% of its original forest cover since 1970 — an area roughly the size of France. Most of this loss has been concentrated in the Brazilian "arc of deforestation" along the southern and eastern fringes of the forest. Cattle ranching accounts for about 80% of cleared land, soy farming for much of the rest. Studies suggest the Amazon may be approaching a "tipping point" at 20–25% deforestation, beyond which large parts of the forest could transition to savanna due to disrupted rainfall recycling. Australia has experienced a different kind of large-scale land change: roughly 40% of its native forest has been cleared since European colonization, mostly for grazing and wheat farming. Australia loses around 250,000 hectares of native vegetation per year, one of the highest rates in the developed world.

Comparing Footprints

If you laid the Amazon rainforest over Australia on a map, it would cover most of the country with a gap roughly the size of Western Australia's western half left over. Both regions are continental in scale — most countries on Earth are smaller than either. Texas (696,000 km²) would fit inside Australia about 11 times; the Amazon would hold about 8 Texases. This kind of scale is hard to grasp until you start running these comparisons.

Indigenous Populations

The Amazon is home to over 400 distinct Indigenous groups, totaling roughly 1 million people. Some — like the Yanomami, Kayapo, and Asháninka — have hundreds of thousands of members and well-known leaders. Others remain uncontacted by outsiders; Brazil's FUNAI agency officially recognizes more than 100 isolated groups within Amazonian rainforest, the largest concentration of uncontacted peoples in the world. Australia's Indigenous population — Aboriginal and Torres Strait Islander peoples — represents one of the oldest continuous human cultures on the planet, with archaeological evidence of habitation going back at least 65,000 years. Today, around 3.8% of Australia's population identifies as Indigenous, with the highest concentrations in the Northern Territory.

Key Facts

• Australia is about 1.4× the size of the Amazon rainforest.
• The Amazon spans 9 countries; Australia is a single country.
• The Amazon holds 20% of the world's liquid freshwater (in its river system).
• Australia is the only country to occupy an entire continent.
• Both regions face severe climate-related threats — deforestation in the Amazon, bushfires and drought in Australia.

Fun Facts

• The Amazon River releases 209,000 m³ of water per second into the Atlantic — more than the next 7 largest rivers combined.
• Australia is the flattest and driest inhabited continent.
• The Amazon basin contains an estimated 390 billion trees.
• Australia is home to 21 of the world's 25 most venomous snake species.
• The Amazon's canopy creates its own rainfall through evapotranspiration.

The Bottom Line

Australia is bigger than the Amazon rainforest — about 40% larger. But the comparison reveals something striking: a single biome on one continent (the Amazon) approaches the size of an entire continent-country (Australia). Both are critical to Earth's ecological future. The Amazon's deforestation and Australia's bushfires and biodiversity crisis make these two regions among the most-watched ecological battlegrounds on the planet. They are different in nearly every way — climate, ecology, history, governance — but similar in their irreplaceable global importance.