New York Harbor, showing Newark Bay in red. The Passaic (left) and Hackensack (right) rivers can be seen feeding into the bay from its north end. The Port Newark-Elizabeth Marine Terminal can be seen along the west side of the bay. The tidal strait connecting the bay to the main harbor is the Kill Van Kull.

Newark Bay is a body of water, a tiday back bay of New York Harbor formed at the confluence of the Passiac and Hackensack rivers. On its south end, it is connected to Upper New York Bay by the Kill Van Kull, as well as to Raritan Bay by the Arthur Kill. It contains the Port Newark-Elizabeth Marine Terminal.

It is enclosed on the west by the New Jersey cities of Newark and Elizabeth, and on the east by Jersey City and Bayonne. It is enclosed on the south by Staten Island.

It contains Shooters Island, which is part of the borough of Staten Island.

Although a shallow tidal estuary, it is periodically dredged to accommodate ocean-going container ship access to Port Newark-Elizabeth Marine Terminal along its western side.