how many decks on largest cruise ship

The current largest cruise ships in the world have 20 decks.

Quick answer

Royal Caribbean’s newest “mega” ships that hold the title of world’s largest (such as Icon of the Seas and its sister ships) are built with 20 decks from bottom to top, though not every deck is open to passengers.

A bit more context

• Earlier “world’s largest” ships like Wonder of the Seas topped out at 18 decks, with 16 open to guests.

• Newer record‑holders increased that to 20 decks to fit extra neighborhoods, pools, and attractions while still staying within port and safety limits.

So if you’re wondering how many decks on largest cruise ship , the latest answer is: 20 decks in total.

Information gathered from public forums or data available on the internet and portrayed here.