Writing about the MGM Grand Hotel and Casino yesterday got me thinking about whether or not the MGM was indeed the largest in the world. I had also heard that many of the largest hotels in the world are in Vegas. So I decided to check it out. Here is what I found for the top 20 hotels in the US (I couldn't find a world list):

20. Imperial Palace
Las Vegas
Right in the heart of the strip, the Imperial Palace has 2,635 guest rooms and suites.

19. Wynn Las Vegas
Las Vegas
On the old site of the Desert Inn, Howard Huges' last residence. The golf course behind the resort has been redesigned. Only hotel guests can play; No visitors. Green fees: $500 per round. 2,716 rooms. An additional tower has been designated as a separate, all-suite hotel called Encore, and will add another 2,300 rooms when construction is complete.

18. Bally's Casino Resort
Las Vegas
2,814 guest rooms and 300,000 square feet of meeting space.

17. Disney's Pop Century Resort
Walt Disney World, Florida

16. Gaylord Opryland Resort
Nashville
2,881 guest rooms and suites.

15. Treasure Island (Now just TI)
Las Vegas
2,885 guest rooms and a pirate theme

14. Paris Las Vegas Hotel and Casino
Las Vegas
A taste of France on the Las Vegas Strip. 2,916 guest rooms. All hotel employees learn several new words of French each day.

13. Las Vegas Hilton
Las Vegas
A AAA four-diamond resort with 2,956 guest rooms, Barry Manilow, and a Star Trek themed casino. How can you miss?

12. Monte Carlo Hotel Casino
Las Vegas
A more affordable version of the Bellagio with 3,002 guest rooms.

11. Mirage Hotel Casino
Las Vegas
You may feel as if the Siegfried and Roy show lives on, surrounded as you are by white tigers, tropical rain forests and even dolphins. 3,044 guest rooms and suites.

10. Caesar's Palace Hotel Casino
Las Vegas
Caesar's made the list recently with the opening of the new spa tower. 3,349 guest rooms and suites.

9. Hilton Hawaiian Village
Honolulu

8.Flamingo Las Vegas
Las Vegas
A great location, low rates, and 3,565 guest rooms and suites.

7. Circus Circus
Las Vegas
Loud but cheap, and with 3,774 rooms.

6. Bellagio
Las Vegas
For romance, spring for a fountain-view room, tune in the piped-in music on television, and watch the show from your window. Let everyone else jockey for a spot in the street. The most recent tower, opened in December 2004, brings the total to 3,993 guest rooms and suites.

5. Excalibur ("The Castle")
Las Vegas
A family-oriented fanasy hotel at the base of the Strip, with 4,008 affordable guest rooms and suites.


4. The Venetian
Las Vegas
The Venetian has 4,049 suites and a 120,000 square foot casino. Each suite in the Venetian has a fax machine/printer, and guests receive a personal greeting fax with their own personal fax number on arrival. When The Palazzo opens with 3,025 rooms, The Venetian resort, with 7,074 hotel rooms and suites, will become the largest hotel complex in the world.


3. Mandalay Bay (including THEhotel)
Las Vegas
With the addition of 1,118 rooms in the new THEhotel, Mandalay Bay jumps up to #3 on the list with 4,341 total rooms.

2. Luxor Hotel Casino
Las Vegas
The unmistakable pyramid and the adjoining tower house 4,408 guest rooms and suites, making this the second-biggest hotel in the United States.

1. MGM Grand Hotel Casino
Las Vegas
It is the world's largest hotel building, with 5,044 guest rooms, 576 suites in each of the three The Signature at MGM Grand towers, 51 Suites in the SKYLOFTS at MGM Grand and 29 villas in the The Mansion at MGM Grand. The 30-floor building features five outdoor pools, rivers, and waterfalls that cover 6.6 acres, a 380,000 square foot convention center, the MGM Grand Arena, CBS Television City, and the Grand Spa. It also houses numerous shops and night clubs, 16 restaurants, two food courts, and the largest casino in Las Vegas.