Atlantic City has a humble population of around 40,000 in a mere 17 square miles – so how are the two remotely comparable?Ītlantic City is located in New Jersey, which makes it a prime location for gamblers and tourists on the Western Coast. Vegas has a population of over 640,000 and stretches across over 140 square miles of land and water. It is often mentioned in the same breath as Las Vegas, or even Reno, but what you may not have known is that is it only a fraction of the size of those two cities. Atlantic City is famous throughout the world for its casinos and beaches.