New York city has over 8 million people!
Yes, what is the landmass of the city proper?
It depends upon definition.    Manhattan is bounded by Manhattan Island
How many different sections of NY City are there.  I know Manhattan and Brooklyn . . .
There are five boroughs, each of which is a separate county of New York State.
I didn't know that!  
Brooklyn, Queens, Manhattan, The Bronx, and Staten Island were made into a single city in 1898.
I always forget about Staten Island.