Royal Caribbean Wonder of the Seas As of 2023, Royal Caribbean's Wonder of the Seas is the largest cruise ship in the world. Launched in 2022, the Oasis-class vessel can accommodate up to 7,084 guests in 2,867 staterooms and carries as many as 2,204 crew members.

As of 2026, the cruise ship that carries the most people is the Legend of the Seas, a magnificent Icon-class vessel from Royal Caribbean. This "floating city" has an extraordinary maximum passenger capacity of 7,600 guests, supported by a crew of approximately 2,350 members. When at full occupancy, the ship accommodates nearly 10,000 people. It shares this title with its sister ship, the Icon of the Seas, both of which weigh in at over 250,800 gross tons. These ships are designed with 20 decks and features like "Category 6," the largest waterpark at sea, and seven different pools. The immense scale allows for "neighborhoods" like Surfside, specifically built for young families. While older Oasis-class ships like Wonder of the Seas carried nearly 7,000, the Icon-class has pushed the limits of maritime engineering, ensuring that these vessels remain the largest and most populous passenger ships ever constructed.