Las Vegas is 5.7 times larger than Newark, New Jersey.
Area: 363 km2 calculated
Population: 596,424 (2012)
Las Vegas, officially the City of Las Vegas and often known as simply Vegas, is the most populous city in the state of Nevada and the county seat of Clark County. Wikipedia
Area: 63 km2 calculated
Population: 277,727 (2012)
Newark is the largest city in the U.S. state of New Jersey, and the county seat of Essex County. Wikipedia