10-Countries of Largest Submarines in The World

If you’ve ever been fascinated by the mysterious underwater world and the incredible technology that allows humans to explore it, then you’re in for a treat. Submarines have played a crucial role in naval warfare and scientific exploration, pushing the boundaries of what is possible beneath the surface of our oceans. In this article, we’ll take a deep dive into the top 10 largest submarines in the world. From military behemoths to technological marvels, get ready to be amazed as we unveil these engineering wonders! So grab your diving gear and let’s begin our journey into submarine superlatives!

United States

When it comes to submarines, the United States leads the pack with its impressive fleet of underwater giants. The U.

S. Navy is renowned for its advanced technology and cutting-edge innovation in submarine design. One standout example is the Ohio-class submarines, known as “boomers.” These massive vessels are capable of carrying ballistic missiles and serve as a key component of America’s nuclear deterrent strategy.

But size isn’t everything when it comes to U.

S. submarines. The Virginia-class submarines showcase the country’s commitment to versatility and stealthy operations. With their sleek design and state-of-the-art systems, these fast-attack submarines can perform a wide range of missions, from intelligence gathering to anti-submarine warfare.

In recent years, the U.

S. has also been developing next-generation submarines like the Columbia-class that will replace older models and bolster their strategic capabilities even further. These new subs will incorporate advanced technologies to ensure increased survivability and enhanced operational effectiveness.

The United States’ dominance in submarine technology extends beyond just military applications though; they have made significant contributions in scientific research too. Submarines like Alvin have enabled groundbreaking exploration of deep-sea ecosystems, volcanic activity, and sunken shipwrecks – expanding our knowledge about our planet’s hidden depths.


Russia is known for its impressive military capabilities, and its submarine fleet is no exception. When it comes to the largest submarines in the world, Russia has a strong presence.

One of the notable submarines in Russia’s arsenal is the Typhoon-class submarine. These massive vessels were built during the Soviet era and are still considered one of the largest submarines ever built. With a length of over 170 meters and a displacement of more than 48,000 tons, these submarines are truly colossal.

Another noteworthy Russian submarine is the Borei-class submarine. These modern nuclear-powered submarines feature advanced technology and weaponry systems. With their sleek design and formidable capabilities, they are among some of the most powerful submarines in operation today.

In addition to these giants, Russia also operates other classes of submarines such as Yasen-class and Oscar-II class submarines. Each brings its own unique strengths to Russia’s naval forces.

The size and capabilities of Russia’s submarine fleet demonstrate their commitment to maintaining a strong maritime defense strategy. It also serves as a reminder that when it comes to underwater warfare, Russia remains at the forefront.

As we move on to explore more countries with large submarine fleets, it becomes clear that each nation has its own unique contributions to this arena. From technological advancements to sheer size, these giant underwater vessels play an important role in shaping global security dynamics


China is a country known for its technological advancements and military capabilities. When it comes to submarines, China has made significant strides in recent years. The Chinese Navy, also known as the People’s Liberation Army Navy (PLAN), possesses some of the largest submarines in the world.

One of their notable submarine classes is the Type 094 Jin-class ballistic missile submarine. These submarines are designed for carrying nuclear missiles and ensuring China’s deterrence capability. With a length of approximately 133 meters and displacement of around 11,000 tons, these vessels rank among the largest submarines globally.

Additionally, China developed the Type 093 Shang-class attack submarine. These subs are primarily used for anti-surface ship warfare and land-attack missions. They measure around 110 meters in length and have a displacement of about 7,000 tons.

Furthermore, China has been actively working on advanced submarine technologies such as air-independent propulsion systems to enhance underwater endurance and stealth capabilities.

The continuous development of large submarines by China showcases its commitment to strengthening its naval forces and expanding its maritime influence in the Asia-Pacific region. As technology advances further, it will be interesting to see how China’s submarine fleet continues to evolve on an international scale.


Japan, an island nation known for its technological advancements and rich cultural heritage, is also home to one of the largest submarines in the world. The country’s naval forces boast a formidable fleet that includes some impressive undersea vessels.

Among Japan’s notable submarines is the Soryu-class submarine. This diesel-electric powered submarine measures approximately 84 meters in length and can carry a crew of around 65 personnel. It has been praised for its advanced stealth capabilities and state-of-the-art technology, making it a formidable force in maritime defense.

Another noteworthy submarine in Japan’s arsenal is the Oyashio-class submarine. With a length of about 81 meters, this diesel-electric vessel showcases Japan’s commitment to innovation and cutting-edge design. Its sophisticated equipment allows for enhanced surveillance and reconnaissance capabilities.

Japanese submarines not only possess impressive size but are also equipped with advanced weaponry systems, making them capable of engaging in various missions such as anti-submarine warfare or intelligence gathering operations.

Japan continues to invest heavily in research and development to ensure that their naval forces remain at the forefront of technological advancements. Through constant innovation, they aim to maintain their position among the world’s largest submarines while ensuring national security on both regional and global scales.

North Korea

North Korea, a country shrouded in mystery and secrecy, is also home to one of the largest submarine fleets in the world. Known for its unpredictable behavior on the international stage, North Korea’s submarines play a crucial role in their military strategy.

One of their most notable submarines is the Sinpo-class submarine, which was first introduced in 2014. This diesel-electric powered vessel has an estimated length of around 67 meters and can carry various types of torpedoes and missiles. While there are limited details available about its capabilities, it is believed to have stealth features that make it harder to detect by enemy radars.

In addition to the Sinpo-class submarines, North Korea also operates older Romeo-class and Sang-O-class submarines. These aging vessels may not match up in terms of size or technology with some of the other countries on this list but still pose a threat due to their sheer numbers.

It’s important to note that due to limited access and information from within North Korea itself, much remains unknown about their exact capabilities or advancements in submarine technology. However, what we do know is that these submarines serve as an integral part of North Korea’s overall defense strategy.

As tensions continue between North Korea and other nations around the world, keeping an eye on their submarine fleet will be crucial for maintaining global security. The presence of these large submarines serves as a reminder that even small countries can possess significant military power when it comes to underwater warfare.


India, with its vast coastline and strategic location in the Indian Ocean region, has steadily built up its submarine fleet over the years. The country’s submarines play a crucial role in safeguarding India’s maritime interests and maintaining regional stability.

One of India’s largest submarines is the INS Arihant, which is a nuclear-powered ballistic missile submarine (SSBN). It was commissioned into service in 2016 and is capable of carrying ballistic missiles with nuclear warheads. This indigenously-built submarine provides India with a credible second-strike capability, enhancing its overall deterrence posture.

In addition to the INS Arihant, India also operates conventional diesel-electric submarines such as the INS Chakra and the INS Kalvari. These submarines are equipped with state-of-the-art technology and weapons systems, ensuring that they can effectively carry out various missions including surveillance, anti-submarine warfare, and intelligence gathering.

The development of India’s submarine fleet highlights its commitment to maritime security and its aspiration to become a major naval power in the region. With ongoing modernization efforts and indigenous production capabilities, India aims to further strengthen its underwater warfare capabilities in order to maintain peace and stability in the Indian Ocean.

India’s growing submarine fleet underscores its determination to protect its national interests at sea while contributing towards maintaining a secure environment for all nations operating in this vital waterway.


Iran, a country known for its rich history and cultural heritage, is also home to one of the largest submarine fleets in the world. With tensions rising in the region, Iran has been actively expanding its naval capabilities to protect its interests in the Persian Gulf.

The Iranian Navy operates several types of submarines, including diesel-electric and midget submarines. One notable example is the Ghadir-class submarine, which is indigenous to Iran. This type of submarine is small and highly maneuverable, making it ideal for operations in shallow waters.

In addition to its domestic submarine production, Iran has also acquired submarines from other countries. The Kilo-class submarine purchased from Russia has further strengthened Iran’s maritime defense capabilities.

Despite international sanctions limiting Iran’s access to advanced military technologies, they have managed to develop their own unique designs through reverse engineering and domestic research programs. This demonstrates their determination and self-sufficiency when it comes to defense technology.

While not as large or technologically advanced as some of the other nations on this list, Iran’s submarine fleet plays a crucial role in maintaining security within its territorial waters. As tensions continue to simmer in the region, it will be interesting to see how Iran further develops its naval capabilities moving forward


Turkey, a country that straddles Europe and Asia, is not only known for its rich history and stunning landscapes but also for having one of the largest submarine fleets in the world. With its strategic location along key waterways, Turkey has recognized the importance of maritime defense and has invested heavily in developing a formidable navy.

The Turkish Navy operates several submarines, including some of the largest in the world. One notable submarine is the Preveze Class, which consists of four diesel-electric submarines. These submarines have advanced features such as stealth capabilities and state-of-the-art sonar systems, making them highly effective in covert operations.

Another remarkable submarine in Turkey’s fleet is the Gür-class (Type 214) submarines. Built with German technology, these modern submarines are equipped with AIP (Air-Independent Propulsion) systems that allow them to remain submerged for extended periods without surfacing. This capability enhances their stealthiness and endurance during missions.

Turkey’s commitment to expanding its naval capabilities has allowed it to strengthen its presence in critical regions like the Black Sea and Eastern Mediterranean. As a NATO member, Turkey plays an essential role in ensuring regional security while safeguarding its own interests.

In recent years, Turkey has demonstrated its intent to become more self-reliant by investing in indigenous submarine construction programs. The development of MILGEM-class submarines showcases Turkey’s determination to bolster domestic defense industries while acquiring cutting-edge technologies from international partners.

With a strong emphasis on technological advancements and operational efficiency, Turkey remains a significant player on the global submarine stage. Its dedication to maintaining a robust naval force underscores both national security priorities and ambitions for regional influence.


Pakistan, a country located in South Asia, is not only known for its rich history and culture but also for its impressive submarine fleet. With the Indian Ocean at its doorstep, Pakistan recognizes the significance of maintaining a strong maritime presence.

One of the largest submarines in Pakistan’s fleet is the Agosta-90B class submarine. It measures approximately 76 meters in length and has a displacement of around 2,500 tonnes. This diesel-electric powered submarine can carry torpedoes and anti-ship missiles, making it a formidable force to reckon with.

Another notable submarine is the Khalid-class diesel-electric attack submarine. With a length of about 74 meters and a displacement of around 2,000 tonnes, this sub is capable of launching both torpedoes and cruise missiles. Its advanced sonar systems enhance its stealth capabilities underwater.

In recent years, Pakistan has been working on expanding its naval capabilities further by acquiring more advanced submarines from China under the name Type 039A Yuan-class submarines. These submarines have superior acoustic silencing technology that makes them difficult to detect underwater.

With these powerful vessels at their disposal, Pakistan continues to strengthen its naval forces and contribute to regional security efforts. The country’s commitment to maintaining an effective submarine fleet showcases their determination to safeguard their national interests in the volatile waters surrounding them


Largest Submarines in The World
In this article, we have explored the 10 largest submarines in the world. These powerful and technologically advanced vessels are a testament to the capabilities of their respective nations. From the United States’ Ohio-class submarines to Russia’s Borei-class fleet, each country has invested significant resources into developing these formidable underwater machines.

The competition for submarine supremacy is fierce among nations like China, Japan, North Korea, India, Iran, Turkey, and Pakistan. As advancements in technology continue to push boundaries, it is likely that even larger and more sophisticated submarines will emerge in the future.

These massive submarines serve multiple purposes ranging from defense and deterrence to intelligence gathering and power projection. They allow countries to extend their reach beyond their shores and exert influence on a global scale.

The race for building bigger and more capable submarines remains an ongoing endeavor as countries strive to strengthen their naval capabilities. With advances in stealth technology and weapon systems integration becoming more prevalent with each passing year, it will be fascinating to see how these developments shape future submarine fleets.

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