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Top Countries Holding the World’s Uranium Reserves in 2025
1. Australia Dominates the Globe with the Largest Uranium Reserves
Australia leads all nations with approximately 1.7 million tonnes of uranium. Its vast natural deposits make it a key player in the global nuclear landscape, contributing roughly 28% of the world’s known reserves. The country’s storied history in uranium mining and ongoing investments ensure its position remains secure in the foreseeable future.
2. Kazakhstan Continues as a Major Uranium Producer and Reserve Holder
Kazakhstan holds around 815,000 tonnes of uranium reserves, solidifying its role as a vital supplier for nuclear energy worldwide. Its efficient mining operations and government-backed initiatives have kept it at the forefront, fostering stable supply chains for nuclear power plants across Europe, Asia, and North America.
3. Canada Keeps Its Place in the Top Tier
With approximately 589,000 tonnes of uranium reserves, Canada maintains its standing among the world’s top reserves holders. Its prolific Athabasca Basin remains a prime source of high-grade uranium, supporting Canada’s longstanding position as an influential nuclear exporter.
4. Russia’s Substantial Reserves and Strategic Position
Russia has around 481,000 tonnes of uranium reserves, which not only support its own nuclear energy ambitions but also bolster its geopolitical influence within the nuclear trade. As a leading producer, Russia’s supply stability impacts global uranium markets significantly.
5. Namibia and South Africa: Key Players in Africa’s Uranium Sector
Namibia possesses roughly 470,000 tonnes, with South Africa close behind at 321,000 tonnes. These nations have historically contributed to Africa’s growing presence in the nuclear fuel industry, with Namibia quickly rising as an essential supplier due to recent exploration efforts and stable mining operations.
6. Brazil’s Growing Uranium Reserves
Brazil holds approximately 311,000 tonnes of uranium, positioning itself as South America’s primary uranium reserve holder. With plans to expand its nuclear energy capacity, Brazil is increasingly investing in sustainable extraction and processing facilities.
7. Positioned in the Sahel: Niger and Mongolia’s Emerging Significance
Niger has about 277,000 tonnes of uranium reserves, making it a key resource for West Africa’s energy future. Meanwhile, Mongolia’s reserves stand at 145,000 tonnes, marking it as an emerging player in Asian nuclear resource markets.
8. Central Asia’s Role with Uzbekistan and Ukraine
Uzbekistan reserves total approximately 131,000 tonnes, contributing to the region’s strategic importance. Ukraine holds around 107,000 tonnes, which, despite geopolitical challenges, remains a significant part of Europe’s energy mix.
9. Rest of the World and the Global Total
Other nations collectively hold around 524,000 tonnes of uranium reserves, encompassing a diverse range of smaller producers and emerging markets.
10. The Global Picture
Total estimated global uranium reserves now reach approximately 6.1 million tonnes, reflecting a steady increase thanks to ongoing exploration, technological advancements, and increased demand from nuclear energy sectors worldwide.
Note: These figures are based on 2025 estimates, with data sourced from the World Nuclear Association (August 2023) via Visual Capitalist.
[Image: World map showing top uranium reserves by country, highlighting Australia, Kazakhstan, and Canada]
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