The population of Clark County is 2.2 million. Most of what people think of as Vegas is in the County. ie the strip is all County.
https://www.census.gov/quickfacts/fact/table/clarkcountynevada/PST045217
So what? Are you suggesting as the other poster did, that half of LA and the county, which is about 7 million freaking people, have all moved to the Vegas area? Come on now. No one buys that.