Newark Bay is shown highlighted on a TERRA image of New York Harbor

Newark Bay is a body of water, a tidal back bay of New York Harbor formed at the confluence of the Passaic 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.

It is spanned by the Newark Bay Bridge connecting Jersey City and Newark.