* Atlantic Ocean - The Atlantic Ocean forms the eastern boundary of the Northeast region.
* Long Island Sound - A 110-mile-long estuary located between Long Island and Connecticut.
* Lake Champlain - A 120-mile-long lake shared by New York and Vermont.
* Lake George - A 32-mile-long lake located in upstate New York.
* Saint Lawrence River - A 744-mile-long river that flows from Lake Ontario to the Atlantic Ocean.
* Chesapeake Bay - A 200-mile-long estuary located in Maryland and Virginia.
* Delaware Bay - A 82-mile-long estuary located in Delaware and New Jersey.
* Raritan Bay - A 13-mile-long estuary located in New Jersey.
* Connecticut River - A 410-mile-long river that flows through New Hampshire, Vermont, Massachusetts, and Connecticut.
* Androscoggin River - A 178-mile-long river that flows through Maine and New Hampshire.
* Kennebec River - A 170-mile-long river that flows through Maine.
* Penobscot River - A 281-mile-long river that flows through Maine.
* Saint John River - A 418-mile-long river that flows through Maine and New Brunswick, Canada.