New York City Metro Gated Communities
A gated community

The New York City Metro is the most populous metropolitan area in the United States and the fourth most populous in the world (after Tokyo, Seoul, and Mexico City).
The metropolitan area is defined by the United States Census Bureau as the New York-Northern New Jersey-Long Island, NY-NJ-PA Metropolitan Statistical Area (MSA), with an estimated population (as of 2005) of 18,747,320. The MSA is further subdivided into four metropolitan divisions. The 23-county metropolitan area includes the seven counties that constitute New York City and Long Island, twelve counties in northern New Jersey, three counties north of New York City in New York State, and one county in northeastern Pennsylvania.