New York City is often referred to collectively as The Five Boroughs.  Unlike most American cities, which lie within a single county, or, at most, constitute a county in themselves, each of New York City's five boroughs is coextensive with a county of New York state: (from Wikipedia)
    Here's a look at hip hop representation from each Borough. 

QUEENS
    Run DMC

    NAS

BROOKLYN
    Beastie Boys

    Jay Z

STATEN ISLAND
    Wu Tang Clan

THE BRONX
    Afrika Bambaataa

    KRS-One

MANHATTAN
    Big L

    Diddy