Administratively, yes: Roosevelt Island is part of the Borough of Manhattan in New York City. While it sits in the East River between Manhattan Island and Queens, it falls under the jurisdiction of Manhattan Community Board 8. In 2026, it remains a unique residential enclave known for its tramway, its pneumatic trash collection system, and its status as a state-leased territory managed by the Roosevelt Island Operating Corporation (RIOC). Even though it is physically closer to Long Island City, Queens, its zip code (10044) is a Manhattan designation. For 2026 visitors, this means that while you feel "away from the city," you are technically still in the heart of the most famous borough, enjoying the parks and the Cornell Tech campus while staying within the legal and political boundaries of Manhattan.