7 countries with the world’s largest submarine fleets in 2026
Global submarine fleet construction is accelerating, with China launching 24 vessels in five years to challenge the dominance of the US and Russia. While the US maintains a fully nuclear-powered fleet, other nations are rapidly expanding their naval capabilities.
Why it matters
The rapid expansion of submarine fleets indicates a shift in global military strategy and a return to Cold War-era naval competition.
Submarine construction is running at a pace not seen since the Cold War. China alone has launched 24 boats in five years, more than the US and Russia combined over the same stretch, and new nuclear-submarine programs are now underway from Brazil to North Korea. Only a handful of nations currently build nuclear-powered boats at all, the US, Russia, China, the UK, and France, with India closing the gap after commissioning its third ballistic missile submarine, INS Aridhaman.Against that backdrop, here’s how the world’s largest navies stack up by raw fleet size, ranked by total submarine count rather than propulsion type, age, or combat capability.1.
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