There's something about mega-ships, those floating skyscrapers laid sideways. So here lies our list of the world's largest cruise vessels, ranked in order of gross tonnage, a measure of volume (and not weight). You'll also find stats on passenger capacity (both double occupancy, the industry standard, and max occupancy, which accounts for all third and fourth beds), length and beam (the width at the widest point).

Click on any ship name for a comprehensive expert review covering everything from cabins to dining, hundreds of reader reviews, deck plans and itinerary info.

Rank

Ship (Line - Launched)

Tonnage

Length

Beam

Pax (DBL/MAX)
1

Symphony of the Seas
(Royal Caribbean - 2018)

Photos

230,000 gt.

1,188 ft.

215.5 ft.

5,535/6,870
2

Harmony of the Seas
(Royal Caribbean - 2016)

Photos

226,963 gt.

1,188 ft.

215 ft.

5,479/6,780 
3

Allure of the Seas
(Royal Caribbean - 2010)

Photos

225,282 gt.

1,187 ft.

215 ft.

5,492/6,410
4

Oasis of the Seas
(Royal Caribbean - 2009)

Photos

225,282 gt.

1,187 ft.

215 ft.

5,400/6,360
5

MSC Meraviglia
(MSC Cruises - 2017)

171,598 gt.

1,036 ft.

141 ft.

4,475/5,714
6

Quantum of the Seas
(Royal Caribbean - 2014)

Photos

168,666 gt.

1,141 ft.

136 ft.

4,180/4,905
7

Anthem of the Seas
(Royal Caribbean - 2015)

Photos

168,666 gt.

1,141 ft.

136 ft.

4,180/4,905
8

Norwegian Bliss
(Norwegian Cruise Line - 2018)

Photos

167,800 gt.

1,082 ft.

136 ft.

4,004/4,903
9

Ovation of the Seas
(Royal Caribbean - 2016)

Photos

167,666 gt.

1,138 ft.

136 ft.

4,180/4,905
10

Norwegian Escape
(Norwegian Cruise Line - 2015)

Photos

164,600 gt.

1,069 ft.

136 ft.

4,248/N/A
11

Liberty of the Seas
(Royal Caribbean - 2007)

Photos

160,000 gt.

1,112 ft.

185 ft.

3,798/4,960
12

Norwegian Epic
(Norwegian Cruise Line - 2010)

Photos

155,873 gt.

1,081 ft.

133 ft.

4,100/N/A
13

Freedom of the Seas
(Royal Caribbean - 2006)

Photos

154,407 gt.

1,112 ft.

185 ft.

3,782/4,515
14

Independence of the Seas
(Royal Caribbean - 2008)

154,407 gt.

1,112 ft.

185 ft.

3,634/4,375
15

MSC Seaside
(MSC Cruises - 2017)

Photos

154,000 gt.

1,060 ft.

135 ft.

4,134/5,119
16

Queen Mary 2
(Cunard - 2004)

Photos

148,528 gt.

1,130 ft.

148 ft.

2,592/3,090
17

Norwegian Breakaway
(Norwegian Cruise Line - 2013)

Photos

146,600 gt.

1,068 ft.

169 ft.

3,969/N/A
18

Norwegian Getaway
(Norwegian Cruise Line - 2014)

Photos

145,655 gt.

1,068 ft.

169 ft.

3,969/N/A
19

Britannia
(P&O Cruises - 2015)

Photos

143,000 gt.

1,083 ft.

144 ft.

3,647/NA
20

Royal Princess
(Princess Cruises - 2013)

Photos

141,000 gt.

1,083 ft.

155 ft.

3,600/N/A
21

Regal Princess
(Princess Cruises - 2014)

Photos

141,000 gt.

1,083 ft.

155 ft.

3,560/N/A
22

MSC Divina
(MSC Cruises - 2012)

Photos

139,072 gt.

1,083 ft.

124 ft.

3,502/4,345
23

MSC Preziosa
(MSC Cruises - 2013)

Photos

139,072 gt.

1,093 ft.

124 ft.

3,502/4,345
24

Navigator of the Seas
(Royal Caribbean - 2002)

Photos

138,279 gt.

1,020 ft.

157 ft.

3,686/3,990
25

Mariner of the Seas
(Royal Caribbean - 2003)

Photos

138,279 gt.

1,020 ft.

157 ft.

3,114/3,807
26

MSC Fantasia
(MSC Cruises - 2008)

Photos

137,936 gt.

1,083 ft.

124 ft.

3,274/4,363
27

MSC Splendida
(MSC Cruises - 2009)

Photos

137,936 gt.

1,083 ft.

124 ft.

3,274/4,363
28

Explorer of the Seas
(Royal Caribbean - 2000)

Photos

137,308 gt.

1,020 ft.

157 ft.

3,286/4,290
29

Voyager of the Seas
(Royal Caribbean - 1999)

Photos

137,276 gt.

1,020 ft.

157 ft.

3,286/4,269
30

Adventure of the Seas
(Royal Caribbean - 2001)

Photos

137,276 gt.

1,020 ft.

157 ft.

3,114/3,807
31

Carnival Horizon
(Carnival Cruise Line - 2018)

133,500 gt.

1,055 ft.

122 ft.

3,960/5,056
32

Carnival Vista
(Carnival Cruise Line - 2016)

Photos

133,500 gt.

1,055 ft.

122 ft.

3,936/NA
33

Costa Diadema
(Costa Cruises - 2014)

Photos

132,500 gt

1,004 ft.

122 ft.

3,963/N/A
34

Disney Fantasy
(Disney Cruise Line - 2012)

Photos

130,000 gt.

1,115 ft.

121 ft.

2,500/4,000