In the last ten years, the cruise industry has experienced a colossal expansion. Ships are growing to unprecedented sizes, capable of housing over 7,000 passengers and 2,300 crew members. Alongside increased capacity, cruise lines are incorporating incredible features like theme parks, race tracks, waterslides, and even roller coasters, replacing the traditional deck activities. Let’s explore the world’s largest cruise ships, including a few remarkable ones, and their maximum passenger capacity.

Icon of the Seas, Royal Caribbean

Royal Caribbean’s most colossal vessel yet, Icon of the Seas, is set to embark in January 2024, accommodating up to 7,600 passengers alongside 2,350 staff. Spanning 20 decks, the ship is tailor-made for families, boasting seven pools, nine whirlpools, and an extensive waterpark with six exhilarating waterslides.

Wonder of the Seas, Royal Caribbean

Royal Caribbean’s extraordinary Wonder of the Seas created a splash upon its March 2022 launch, claiming the title of the “world’s largest cruise ship” with a staggering 236,857 gross tonnage. The vessel spans 18 decks, arranged into eight unique “neighborhoods,” featuring the innovative underwater-themed Playscape designed for young adventurers. The ship’s entertainment lineup encompasses the AquaTheatre, where performers dive from 30ft platforms into the water.

Harmony of the Seas, Royal Caribbean

Harmony of the Seas, an Oasis-class marvel by Royal Caribbean, is a floating paradise. Its Oasis offerings encompass the bustling Royal Promenade adorned with shops and eateries, the Boardwalk featuring a whimsical carousel, and the ten-deck thrill-seekers’ delight, the Ultimate Abyss slide. Outside, an array of waterslides, surf simulators, rock-climbing walls, and the kid-friendly Splashaway Bay awaits.

Symphony of the Seas, Royal Caribbean

Yet another world record holder upon its 2018 debut, Royal Caribbean’s Symphony of the Seas is a spectacle of entertainment. With 22 restaurants, 42 bars and lounges, a zip line, and an ice rink, it offers nonstop excitement. Among the stateroom highlights is the astounding two-story, 1,346 sq ft family suite, boasting a slide from the kids’ room to the living area, a climbing wall, and a 3D cinema.

Iona, P&O Cruises

Debuting in 2021 as the largest cruise ship tailored for the UK market, P&O Cruises’ Iona is a trailblazer. It’s among the world’s initial ships powered by liquefied natural gas (LNG), a cleaner option than diesel. Iona stands out with the first onboard gin distillery and the expansive glass-encased SkyDome, serving as a pool, lounge, and dining space during the day, transforming into a stunning starlit entertainment hub by night.

Mardi Gras, Carnival Cruise Line

Honoring its 1972 predecessor, which hosted around 1,000 passengers, the Mardi Gras stands as the flagship of Carnival’s fleet. Its standout attraction is Bolt, the pioneering onboard rollercoaster. Mardi Gras pioneers themed zones, with highlights including the New Orleans French Quarter and the Italian-infused La Piazza.

Presented below are additional notable examples of sizable vessels we’ve compiled.