Cruise ships continue to grow larger and more impressive, redefining luxury and entertainment on the high seas.
Over the years, cruise lines have been in fierce competition to build the biggest and most innovative ships, offering everything from skydiving simulators to massive water parks.
Royal Caribbean International dominates the list, securing the top eight spots with its record-breaking Oasis and Icon Class cruise ships. However, other cruise lines, such as MSC Cruises, Costa Cruises, and Carnival Cruise Line, have also introduced massive cruise ships that push the boundaries of modern cruising.
Are you curious about what cruise ships are the biggest in the world? Here’s our ranking for 2025.
Three of the cruise ships on this list are being introduced this year, 2025.
Note: Cruise ships are measured in gross tonnage, a measurement of internal volume rather than weight.
1. Icon of the Seas
- Gross tonnage: 248,663
- Cruise line: Royal Caribbean International
- Year: 2024
- Length: 1,196 ft
- Capacity: 5,610 (double occupancy)
2. Star of the Seas (Debuting in 2025)
- Gross tonnage: 248,663
- Cruise line: Royal Caribbean International
- Year: 2025
- Length: 1,196 ft
- Capacity: 5,610 (double occupancy)
3. Utopia of the Seas
- Gross tonnage: 236,473
- Cruise line: Royal Caribbean International
- Year: 2024
- Length: 1,188 ft
- Capacity: 5,668 (double occupancy)
4. Wonder of the Seas
- Gross tonnage: 235,600
- Cruise line: Royal Caribbean International
- Year: 2022
- Length: 1,188 ft
- Capacity: 5,734 (double occupancy)
5. Symphony of the Seas
- Gross tonnage: 228,081
- Cruise line: Royal Caribbean International
- Year: 2018
- Length: 1,188 ft
- Capacity: 5,518 (double occupancy)
6. Harmony of the Seas
- Gross tonnage: 226,963
- Cruise line: Royal Caribbean International
- Year: 2016
- Length: 1,188 ft
- Capacity: 5,479 (double occupancy)
7. Oasis of the Seas
- Gross tonnage: 226,838
- Cruise line: Royal Caribbean International
- Year: 2009
- Length: 1,187 ft
- Capacity: 5,602 (double occupancy)
8. Allure of the Seas
- Gross tonnage: 225,282
- Cruise line: Royal Caribbean International
- Year: 2010
- Length: 1,187 ft
- Capacity: 5,496 (double occupancy)
9. MSC World America (Debuting in 2025)
- Gross tonnage: 216,000
- Cruise line: MSC Cruises
- Year: 2025
- Length: 1,092 ft
- Capacity: 5,240 (double occupancy)
10. MSC World Europa
- Gross tonnage: 215,683
- Cruise line: MSC Cruises
- Year: 2022
- Length: 1,093 ft
- Capacity: 5,240 (double occupancy)
11. Disney Adventure (Debuting in 2025)
- Gross tonnage: 208,000
- Cruise line: Disney Cruise Line
- Year: 2025
- Capacity: 6,700 (full capacity)
12. Costa Toscana
- Gross tonnage: 186,364
- Cruise line: Costa Cruises
- Year: 2021
- Length: 1,106 ft
- Capacity: 5,224 (double occupancy)
13. Costa Smeralda
- Gross tonnage: 185,010
- Cruise line: Costa Cruises
- Year: 2019
- Length: 1,106 ft
- Capacity: 5,224 (double occupancy)
14. P&O Arvia
- Gross tonnage: 184,700
- Cruise line: P&O Cruises
- Year: 2022
- Length: 1,130 ft
- Capacity: 5,200 (double occupancy)
15. P&O Iona
- Gross tonnage: 184,000
- Cruise line: P&O Cruises
- Year: 2020
- Length: 1,130 ft
- Capacity: 5,200 (double occupancy)
16. AIDAcosma
- Gross tonnage: 183,900
- Cruise line: AIDA Cruises
- Year: 2022
- Length: 1,106 ft
- Capacity: 5,200 (double occupancy)
17. AIDAnova
- Gross tonnage: 183,900
- Cruise line: AIDA Cruises
- Year: 2018
- Length: 1,106 ft
- Capacity: 5,200 (double occupancy)
18. Carnival Celebration
- Gross tonnage: 183,521
- Cruise line: Carnival Cruise Line
- Year: 2022
- Length: 1,130 ft
- Capacity: 5,374 (double occupancy)
19. MSC Euribia
- Gross tonnage: 183,500
- Cruise line: MSC Cruises
- Year: 2023
- Length: 1,086 ft
- Capacity: 4,810 (double occupancy)
20. Carnival Jubilee
- Gross tonnage: 182,800
- Cruise line: Carnival Cruise Line
- Year: 2023
- Length: 1,130 ft
- Capacity: 5,374 (double occupancy)
