Crosswicks Creek is a 25.3-mile-long (40.7 km)[2] tributary of the Delaware River in Burlington, Mercer, Monmouth and Ocean Counties in central and southern New Jersey.

Its headwaters flow from the Fort Dix and McGuire Air Force Base Military Reserves in a northwesterly direction and then turn sharply south where it meets the Delaware River at Bordentown Township.

With jets roaring overhead and shells being test fired, the Crosswicks Creek watershed has a set of unique concerns and is the focus of many protection and restoration activities.

In the mid 1990s, the New Jersey Department of Transportation opened the missing segment of I-295, which has had a significantly impact on the mouth of the Crosswicks.

There may also be interference with wildlife movement patterns due to the large freeway's presence in the marsh.