Exterior photo of Wonder of the Seas

25 Largest Cruise Ships in the World: Grand Scale Adventure

Cruise ships are getting bigger and bigger all the time. The largest cruise ship in the world is currently Royal Caribbean’s Icon of the Seas. At 250,80 gross tons, the…

Marcello De Lio

Marcello De Lio

December 23, 2025


1 minute

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Cruise ships are getting bigger and bigger all the time. The largest cruise ship in the world is currently Royal Caribbean’s Icon of the Seas. At 250,80 gross tons, the vessel is almost five times larger than the famous Titanic!

The list of ships changes as new vessels enter service in the fast-paced cruise industry. We will do our best to keep the list up to date with accurate information on these behemoth ships.

Top 25 Largest Cruise Ships in the World

Exterior photo of Wonder of the SeasPin
(Photo Credit: Royal Caribbean International)

There are many different ways to measure the size of cruise ships. For instance, the size of ships can be based on length, passenger capacity, or gross tonnage. We will be using gross tonnage as a measure for ship size for our list.

Gross tonnage (GT) is defined as the total volume of a vessel, expressed in units of 100 cubic feet, excluding specific open structures such as deckhouses.