If you have ever stood on a pier next to a modern megaship, you know the feeling: the hull just keeps going, and the balconies stack up like an apartment block that decided to go to sea. The top 10 biggest cruise ships in 2026 are almost all Royal Caribbean vessels, led by the three Icon-class sisters (Icon, Star and Legend of the Seas) at 248,663 gross tons each, followed by all six Oasis-class ships and MSC World America in tenth place. That is a big change from a few years ago, when the list had more variety. Below you will find the full ranking by gross tonnage, the length and guest capacity of every ship, what each one is known for onboard, and the biggest ships from other lines like MSC, Disney, Carnival and P&O, so you can see where your next cruise fits.
Which ships rank as the largest cruise ships right now?
The ten largest cruise ships in service, ranked by gross tonnage (GT), are the Icon-class trio, the six Oasis-class ships and MSC World America. Gross tonnage measures a ship’s enclosed volume rather than its weight, and it is the standard way the industry compares ship size. The figures below come from the list of largest cruise ships maintained on Wikipedia, which tracks registry data.
| Rank | Ship | Cruise line | Gross tonnage | Length | Guests (double / max) | Debut |
|---|---|---|---|---|---|---|
| 1 | Icon of the Seas | Royal Caribbean | 248,663 | 364.75 m (1,197 ft) | 5,610 / 7,600 | 2024 |
| 2 | Star of the Seas | Royal Caribbean | 248,663 | 364.83 m (1,197 ft) | 5,610 / 7,600 | 2025 |
| 3 | Legend of the Seas | Royal Caribbean | 248,663 | 364.84 m (1,197 ft) | 5,610 / 7,600 | 2026 |
| 4 | Utopia of the Seas | Royal Caribbean | 236,473 | 361.12 m (1,185 ft) | 5,668 (double) | 2024 |
| 5 | Wonder of the Seas | Royal Caribbean | 235,600 | 362.04 m (1,188 ft) | 5,734 / 6,988 | 2022 |
| 6 | Symphony of the Seas | Royal Caribbean | 228,081 | 361.01 m (1,184 ft) | 5,518 / 6,680 | 2018 |
| 7 | Harmony of the Seas | Royal Caribbean | 226,963 | 362.12 m (1,188 ft) | 5,494 / 6,687 | 2016 |
| 8 | Oasis of the Seas | Royal Caribbean | 226,838 | 360 m (1,181 ft) | 5,484 / 6,771 | 2009 |
| 9 | Allure of the Seas | Royal Caribbean | 226,637 | 360 m (1,181 ft) | 5,484 / 6,780 | 2010 |
| 10 | MSC World America | MSC Cruises | 216,638 | 333.3 m (1,094 ft) | 5,231 / 6,762 | 2025 |
Two things stand out. First, Royal Caribbean owns nine of the ten spots. Second, the gap between number one and number ten is about 32,000 GT, which is roughly the size of an entire small cruise ship from the 1990s. Published tonnage can also differ slightly between sources, because a ship’s GT is sometimes re-measured after a refit, so treat small differences of a few hundred tons as normal.
What makes each of the top 10 biggest cruise ships stand out?
Each of these ships is a floating resort, but they are not interchangeable. Here is what sets every one of the top 10 biggest cruise ships apart.
1. Icon of the Seas (Royal Caribbean)
Icon of the Seas took the “world’s largest cruise ship” title when it entered service in January 2024, and it still shares that crown with its sisters. It measures about 365 m (1,197 ft), holds 5,610 guests at double occupancy and up to 7,600 when every bed is filled, with a crew of roughly 2,350. The ship is split into eight neighborhoods, and the headline is Category 6, the biggest waterpark at sea, with six slides. It also runs on liquefied natural gas (LNG), which matters if you care about how cleanly your ship burns fuel.
2. Star of the Seas (Royal Caribbean)
Star of the Seas joined in August 2025 with the same 248,663 GT and the same layout as Icon, sailing short Caribbean trips out of Port Canaveral, Florida. If you are weighing it up, our Star of the Seas reviews roundup covers what passengers actually liked and what disappointed them.
3. Legend of the Seas (Royal Caribbean)
Legend of the Seas is the third Icon-class ship and arrived in 2026. It matches its sisters on tonnage and capacity and is a hair longer on paper at 364.84 m. Legend spent its first season in Europe, which makes it the first Icon-class ship many European cruisers can sail without flying to Florida.
4. Utopia of the Seas (Royal Caribbean)
Utopia of the Seas (236,473 GT) is the newest Oasis-class ship, launched in July 2024 and built for three- and four-night weekend getaways from Port Canaveral. It is the first Oasis-class ship powered by LNG. Look out for the Royal Railway, a train-themed dining experience, and the Ultimate Abyss dry slide that drops guests ten decks.
5. Wonder of the Seas (Royal Caribbean)
Wonder of the Seas debuted in 2022 and held the largest-ship title until Icon arrived. It carries 5,734 guests at double occupancy (6,988 max) and was the first ship in the class with eight neighborhoods, including a dedicated Suite Neighborhood. Royal Caribbean itself usually quotes Wonder at 236,857 GT, while current registry data on Wikipedia lists 235,600, which is a good example of why tonnage figures drift between sources.
6. Symphony of the Seas (Royal Caribbean)
Symphony of the Seas (228,081 GT) launched in 2018 and was the biggest cruise ship in the world for four years. It holds up to 6,680 guests and features the AquaTheater, where divers and acrobats perform in front of the Boardwalk, plus laser tag and two FlowRider surf simulators.
7. Harmony of the Seas (Royal Caribbean)
Harmony of the Seas (226,963 GT) arrived in 2016 and carries up to 6,687 guests. It shares the Oasis-class formula: Central Park with real plants, the Boardwalk carousel, Broadway-style shows and a three-slide complex called the Perfect Storm.
8. Oasis of the Seas (Royal Caribbean)
Oasis of the Seas (226,838 GT) is where the whole megaship idea started in 2009. It introduced the neighborhood layout every later Royal Caribbean giant has copied. A 2019 refurbishment added newer features, so it does not feel as old as its birth year suggests, and it still holds up to 6,771 guests.
9. Allure of the Seas (Royal Caribbean)
Allure of the Seas (226,637 GT) entered service in 2010 as Oasis’s near-twin and was refurbished in 2020. It carries up to 6,780 guests. It is a good pick if you want the full Oasis-class experience, usually at a lower fare than the newer sisters.
10. MSC World America (MSC Cruises)
MSC World America (216,638 GT) is the only non-Royal Caribbean ship in the top 10. It debuted in April 2025, sails from Miami, measures 333.3 m (1,094 ft) and holds 6,762 guests at maximum. The ship is organized into seven districts, uses LNG power and adds The Cliffhanger, a swing that sways passengers out over the ocean. MSC’s top-tier suite area, covered in our guide to the MSC Yacht Club, is also onboard if you want a quieter ship-within-a-ship.
What are the biggest cruise ships from other cruise lines?
If you prefer a different cruise line, the largest ships outside Royal Caribbean are MSC World Europa, Disney Adventure, Costa Toscana, Arvia and the Carnival Excel-class ships. Many “biggest ships” lists, including the Southampton Cruise Centre article that inspired this one, mix these in with the Royal Caribbean giants, so here is where they actually rank by size.
| Ship | Cruise line | Gross tonnage | Entered service |
|---|---|---|---|
| MSC World Europa | MSC Cruises | 215,863 | 2022 |
| Disney Adventure | Disney Cruise Line | 208,108 | 2026 |
| Costa Toscana | Costa Cruises | 186,364 | 2021 |
| Arvia | P&O Cruises | 185,581 | 2022 |
| Carnival Celebration | Carnival Cruise Line | 183,521 | 2022 |
| Carnival Jubilee | Carnival Cruise Line | 182,015 | 2023 |
| Norwegian Aqua | Norwegian Cruise Line | 154,140 | 2025 |
MSC World Europa
MSC World Europa is a sister of World America and is the largest ship that sails in Europe all year. If you are booking from the UK or the Mediterranean, this is the closest you will get to a top-10-sized ship without crossing the Atlantic.
Disney Adventure
Disney Adventure is Disney’s biggest ship by a wide margin and is based in Singapore, which makes it the largest cruise ship homeported in Asia. It is built for families, with Marvel and Pixar themed areas spread across seven themed zones.
Arvia and Carnival’s Excel class
Arvia is P&O Cruises’ flagship and a favorite for British cruisers sailing from Southampton, with its SkyDome glass-roofed pool and entertainment space. Carnival Celebration and Carnival Jubilee carry BOLT, the first rollercoaster at sea, on their top decks. Norwegian Aqua is a lot smaller on paper, but it adds the Aqua Slidecoaster, a hybrid waterslide and rollercoaster.
Conclusion
The top 10 biggest cruise ships in 2026 are a Royal Caribbean show: three Icon-class ships at 248,663 GT, all six Oasis-class ships behind them, and MSC World America holding tenth place as the only outsider. Icon of the Seas remains the most famous of the group, but Star and Legend give you the same ship on different itineraries, and the older Oasis-class ships offer most of the fun at lower fares. If you are loyal to another line, MSC World Europa, Disney Adventure, Costa Toscana, Arvia and Carnival’s Excel class are the largest ships you can sail with them. Keep an eye on Hero of the Seas too, due in 2027. Before you book, compare the itinerary and guest numbers rather than chasing the biggest number. For more ship reviews, ferry guides and life-on-the-water stories, explore The Ocean Culture.
Frequently Asked Questions
Q1: What is the biggest cruise ship in the world in 2026?
Icon of the Seas, Star of the Seas and Legend of the Seas share the title. All three Royal Caribbean Icon-class ships measure 248,663 gross tons and about 365 m long, and each carries up to 7,600 guests.
Q2: Which is the longest cruise ship in the world?
The Icon-class ships are the longest at roughly 365 m (1,197 ft). On paper Legend of the Seas is a few centimeters longer than Icon, but in practice the three sisters are the same length.
Q3: How many people can the largest cruise ship hold?
Icon of the Seas holds 5,610 guests at double occupancy and up to 7,600 at full capacity, plus about 2,350 crew. With every bed filled, that is close to 10,000 people on board.
Q4: Is there a cruise ship that holds 10,000 passengers?
No cruise ship carries 10,000 passengers yet. The biggest maximum is 7,600 guests on the Icon-class ships, although guests and crew together come close to 10,000.
Q5: How much bigger is Icon of the Seas than the Titanic?
Titanic measured 46,328 gross register tons and about 269 m long. Icon of the Seas has more than five times the enclosed volume and is nearly 100 m longer.
Q6: What is MSC’s biggest cruise ship?
MSC World America is MSC Cruises’ biggest ship at 216,638 GT, slightly ahead of its sister MSC World Europa at 215,863 GT. It is the only non-Royal Caribbean ship in the top 10.
Q7: Why are most of the biggest cruise ships owned by Royal Caribbean?
Royal Caribbean built its brand around megaships, starting with Oasis of the Seas in 2009. It has kept ordering bigger classes since, while most rival lines build ships in the 140,000 to 220,000 GT range.
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