Why would it be? There is no reason for a neighborhood to be made into a borough. If every New York City neighborhood were made into a borough, the city would have about 1000 boroughs, instead of...
No, neither Harlem nor Yonkers are boroughs of New York City. Harlem is a neighborhood in the borough of Manhattan. New York City has five boroughs: Manhattan, Brooklyn, Queens, The Bronx and Staten...