The East River, which is not a true river, but a tidal strait. It connects to the ocean on both sides. It flows south from the bay known as the Long Island Sound, down the east side of Manhattan and the west side of Queens and Brooklyn, and into the Atlantic Ocean at New York Harbor.
Spain forms the eastern boundary of Portugal.
The Indian Ocean forms the eastern boundary of Africa.
The southern half of the eastern boundary of Alabama is the Chattahoochee River.
Spain is the only country to border Portugal to the east.
Minnesota.
The Atlanic Ocean
The Mississippi River is the East boundary for Arkansas.
Mississippi
The Connecticut River
Mississippi
The country is Eritrea, and it's eastern boundary is formed by the Red Sea.
Two rivers partially form Illinois State's Eastern boundary. The Wabash River is one river that forms Illinois' boundary. The Ohio River is the other river that forms the state's boundary.