The Diocese of Rochester is a Latin Church diocese of the Catholic Church in the Upstate region of New York State in the United States.

The Archdiocese of New York is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church located in the State of New York. It encompasses the boroughs of Manhattan, the Bronx and Staten Island in New York City and the counties of Dutchess, Orange, Putnam, Rockland, Sullivan, Ulster, and Westchester to the north of the city. It does not include the New York City boroughs of Brooklyn or Queens, which are part of the Diocese of Brooklyn.