Re: What County is New York City in??
No, there is no Manhattan County. As Wyatt Barnes posted in the first response to this thread, New York is made up of 5 different counties, each of which is also a borough of the city:
Borough of Manhattan = New York County
Borough of Brooklyn = Kings County
Borough of Queens = Queens County
Borough of the Bronx = Bronx County
Borough of Staten Island = Richmond County
For a history of how the various villages, towns, and counties came together to create present-day New York City see