The 10 Largest Cruise Ships in the World (2025 Edition)

In 2025, the cruise industry continues to push the boundaries of maritime engineering, offering floating cities that redefine luxury and adventure at sea. From record-breaking waterparks to eco-conscious propulsion systems, these colossal vessels are marvels of modern design. Here’s a look at the ten largest cruise ships sailing the oceans today:

1) Icon of the Seas – Royal Caribbean International

• Gross Tonnage: 248,663 GT
• Length: 364.75 meters
• Passenger Capacity: Up to 7,600
• Entered Service: January 2024

Crowned as the world’s largest cruise ship, Icon of the Seas boasts 20 decks filled with unparalleled amenities. Highlights include the largest waterpark at sea, featuring six waterslides, and the tallest waterfall on a cruise ship. Powered by liquefied natural gas (LNG), it represents a step towards more sustainable cruising.

2) Utopia of the Seas – Royal Caribbean International

• Gross Tonnage: 236,860 GT
• Length: 362.12 meters
• Passenger Capacity: Up to 6,788
• Entered Service: July 2024

As the sixth ship in the Oasis class, Utopia of the Seas introduces LNG propulsion to the class, enhancing environmental performance. It features the largest Ultimate Abyss dry slide and offers weekend cruises, catering to short-getaway seekers.

3) Wonder of the Seas – Royal Caribbean International

• Gross Tonnage: 235,600 GT
• Length: 362.1 meters
• Passenger Capacity: Up to 6,988
• Entered Service: March 2022

Once the largest cruise ship, Wonder of the Seas offers a suite sun deck, a fully covered solarium, and new dining experiences like The Mason Jar. Its design emphasizes both grandeur and comfort.

4) Symphony of the Seas – Royal Caribbean International

• Gross Tonnage: 228,081 GT
• Length: 361.011 meters
• Passenger Capacity: Up to 6,680
• Entered Service: April 2018

Symphony of the Seas is renowned for its Ultimate Family Suite, robotic bartenders, and a variety of entertainment options, including zip lines and water parks, making it a family favorite.

5) Harmony of the Seas – Royal Caribbean International

• Gross Tonnage: 226,963 GT
• Length: 362.12 meters
• Passenger Capacity: Up to 6,687
• Entered Service: May 2016

This Oasis-class ship features the unique Rising Tide Bar and a variety of dining options, offering guests a blend of innovation and luxury.

6) Oasis of the Seas – Royal Caribbean International

• Gross Tonnage: 226,838 GT
• Length: 360 meters
• Passenger Capacity: Up to 6,771
• Entered Service: December 2009

As the first ship in the Oasis class, Oasis of the Seas set new standards with its split-structure design and neighborhoods concept, offering diverse experiences onboard.

7) Allure of the Seas – Royal Caribbean International

• Gross Tonnage: 225,282 GT
• Length: 360 meters
• Passenger Capacity: Up to 6,780
• Entered Service: October 2010

Allure of the Seas offers a variety of entertainment options, including Broadway-style shows and a plethora of dining venues, ensuring a vibrant onboard experience.

8) MSC World Europa – MSC Cruises

• Gross Tonnage: 215,863 GT
• Length: 333.3 meters
• Passenger Capacity: Up to 6,762
• Entered Service: December 2022

As MSC’s largest ship, World Europa features the longest dry slide at sea, the Venom Drop, and a microbrewery, blending innovation with sustainability through its LNG propulsion.

9) Costa Smeralda – Costa Cruises

• Gross Tonnage: 185,010 GT
• Length: 337 meters
• Passenger Capacity: Up to 6,554
• Entered Service: December 2019

Powered by LNG, Costa Smeralda offers 11 restaurants, 19 bars, and 13 pools, emphasizing Italian elegance and environmental consciousness.

10) Costa Toscana – Costa Cruises

• Gross Tonnage: 185,010 GT
• Length: 337 meters
• Passenger Capacity: Up to 6,554
• Entered Service: March 2022

A sister ship to Costa Smeralda, Costa Toscana continues the tradition of combining luxury with sustainability, offering guests a refined cruising experience.

Conclusion

The evolution of cruise ships reflects a blend of technological advancement, environmental awareness, and a commitment to unparalleled guest experiences. As these floating cities continue to grow in size and sophistication, they offer travelers an ever-expanding array of adventures on the high seas.