There are two accepted forms for possessive singular nouns that end with an s:
Add an apostrophe (') after the existing s at the end of the word:
Add an apostrophe s ('s) after the existing s at the end of the word:
Examples:
We took a tour of Las Vegas' sites.
We took a tour of Las Vegas's sites.
I would have to answer all three, depending upon which context the term is meant to be conveyed.
The address of the Las Vegas Library is: 833 Las Vegas Blvd North, Las Vegas, 89101 2062
Marquee Nightclub Las Vegas: Cosmopolitan Las Vegas 3708 Las Vegas Blvd. South Las Vegas, NV 89109
By car, it would take about 4 hours and 48 minutes (if your driving from las vegas)
The address of the Madame Tussauds Las Vegas is: 3377 Las Vegas Blvd S, Las Vegas, NV 89109
The Mirage Casino is within the city of Las Vegas. It is on the South Las Vegas boulevard in Las Vegas Nevada. This is the address: 3400 S Las Vegas BLVD,Las Vegas NV,89109
Las Vegas is referred to as Fabulous Las Vegas because there is a sign that was designed by Betty Willis which says "Welcome to Fabulous Las Vegas" located at 5100 Las Vegas Boulevard South.
The address of the Old Las Vegas Mormon Fort is: 908 Las Vegas Blvd N, Las Vegas, NV 89101
'Viva Las Vegas' by Elvis Presley. 'Ooh, Las Vegas' by Gram Parsons. 'The Las Vegas Story' by the Gun Club. 'Queen of Las Vegas' by the B-52s.
from your hairline
The Las Vegas Convention Center is ironically located in Las Vegas, Nevada. Las Vegas is one of the most fun cities in existence. What happens in Vegas, stays in Vegas.
The address of the Guggenheim Las Vegas is: 3355 Las Vegas Blvd S, Las Vegas, NV 89109